m17 R4, questionable quality, unable to reschedule tech, constant delays

Ok so here's my whole situation, from the beginning.

I have an Alienware m17 r4. I was having an issue where my CPU and RAM tabs were not showing up in AWCC. After contacting dell support, they didn't know what the problem was, and decided to send a technician to my place with a refurbished motherboard. The motherboard replacement went smoothly, but it did NOT make the CPU and RAM tabs reappear in AWCC. I ended up fixing it on my own about a week or so later *facepalm* it ended up being an issue with Virtualization based security in windows 11 interfering with AWCC all along. though the old motherboard seemed to be on its way out anyway (intermittent freezes, not detecting AlienFX devices sometimes, noticeably lower performance than the refurbished motherboard, etc.) so I figured the replacement wasn't for nothing.

That's where I was wrong. Right after I found and fixed the VBS issue in window's settings (about a week and a half after the motherboard replacement), the refurbished motherboard started showing some serious issues. I've managed to get it to a point where it will appear to charge and discharge the battery acceptably while doing basic tasks like browsing the web, but when it is plugged in and under a load while playing a game, running a benchmark, or working in CAD or editing software or other stressful software for college, the laptop will just shut off without warning (as fast as unplugging a tower from the wall) and flash a diagnostic code that isn't included within the service manual(4/1). this is unacceptable as I mainly use the laptop plugged in (battery life is far from the longest on gaming laptops) and I cannot afford to take the chance of losing important CAD designs that I work on for hours if the laptop shuts off before I have the chance to save or shuts off halfway through saving and corrupts the entire file. and I don't have time or patience to wait for it to charge to 100% then use it off the charger, then stop what I'm doing and charge it again without using it, so it doesn't shut off. I know it is not a fault within the charger, as one of my friends has a g15 with the exact same 240w charger as mine and it has the exact same issues even when using his charger. All while the support chat was unavailable for the majority of the time that I was having these issues initially. and for the record, IT IS NOT OVERHEATING WHEN IT SHUTS OFF, temps are nice and stable below 65C when it shuts off and I checked out the cooling system when the first technician had it taken apart and everything was spotless.

I did manage to get in contact with support eventually and explain the situation to them, showing them cell phone videos of the laptop shutting off on its own, and they agreed that there must've been a fault with the refurbished motherboard. As I am still well within my warranty, the dell support guy decided to order another replacement motherboard, a DC in cable for the motherboard, and a replacement AC adapter.

That was Monday 14th. The guy was scheduled to arrive Tuesday the 15th, but parts are delayed. alright, understandable. The parts delayed message goes away the next day or so, and the technician is re-scheduled for Thursday the 17th, great. Thursday morning comes, I check the dispatch number, and it's rescheduled for Friday the 18th. I think this is a bit odd at first but it's still within the expected 2-5 business day timeframe, so I think nothing of it. Well, Friday(today) comes along and this morning I check the dispatch number and the technician has been rescheduled again with no warning to next Monday the 21st. This is where I had to draw the line and contact support again to see what was going on. The support person understood my situation and offered to "escalate" the situation for me, alright thanks. I was also supposed to receive an email update from the technician's company (either UNISYS or Glympse) with the appointment proposal and I never received any emails or calls from them.

Here's the thing. I wouldn't have an issue with the delays, I wouldn't even have an issue with the rescheduling. But I'm pretty much forced to build my schedule around the technician showing up and it keeps getting rescheduled the morning of the day he's supposed to arrive.

It's currently scheduled for Monday the 21st, and I'm unavailable that day as I have an important class from 2-5 that I cannot miss, and the technician is supposed to arrive within a 4–8-hour window ending at 4. Well, when I try to reschedule the appointment, it loads and then an error shows up saying to try again and contact "scheduling & account services" if the problem continues. I sent an email reply to the same email from the tech support lady that escalated the case, with no response (the email states to reply to it if there are any questions or issues, I sent it a reply around 8:47AM this morning with no response all day). I don't even know where to contact scheduling and account services.

Sorry for the rant, but this is seriously frustrating. I am a college student, and I can't afford to have an unreliable laptop that shuts off at random. I don't mind the technician coming to my place to fix a problem or replace the motherboard, but if dell is going to carry out warranty repairs with faulty refurbished parts, then what's the point. And if dell can't get reliable parts for their warranty repairs or actually even get a technician on site, then I'm tempted to just ask for a new laptop instead, because I can't keep dealing with this.