Dell will not cover my processor in the international warranty

I live in Costa Rica.
I purchased this model in amazon:
https://www.amazon.com/gp/product/B076129H9F/ref=ox_sc_sfl_title_12?ie=UTF8&psc=1&smid=A1U9HDFCZO1A84

I've been a Dell advocate since early 2000's. I've experienced the benefits of extended warranties many times, and it's the main reason why I'm loyal to the brand.

I've had many desktop models during that time, and always workstations, and even though I work in Graphic Design, contrary to most of my peers who swear by Apple computers, I've always been very happy with my Dell Workstations.

This time around however, I'm deeply disappointed with the results of my most recent purchase.

I bought the computer back in December, and it worked fine for about a month.
Then all of the sudden, it started sounding like a jet engine. The fans at full blast right on start up.
I called up Dell support, and they put me through the motions of testing. Until it was determined, it was a fan error. So I got a visit from a technician, who replaced the case fan and upon replacing it, the BIOS continued to give a fan error. So it was determined it was the CPU fan.
So I got another visit from another technician, who replaced both fans, and the BIOS continued to give a fan error. So it was determined it was the motherboard.
So... another visit. This time, motherboard and both fans where replaced, and the error remained. And this is when the story comes to an end.
I was told, that it was an error on the actual CPU, that it was not communicating properly with the fan (regarding temperature), so the fan would go on full blast, thinking the CPU was overheating (the technician confided that this seems to be a common issue with Ryzen CPU's, and my wife who is a Sales Manager for LA with one of the largest wholesale providers in the world for computer electronics,  told me that Ryzen cpu's are being discontinued).

I was then told by Dell support, that because that CPU is NOT sold to Latin America, even though the rest of the computer is covered by the International Extended Warranty the computer has, the CPU is not. So... they where very sorry, but the problem would not be solved.
So now, I have a desktop computer that sounds like a jet engine all the time. Every time I start it up, I get a BIOS error for the fan, which is very annoying, since it also takes quite a while to do the test before the error...
The computer works fine, but I can't think that a mechanical piece working at full capacity ALL THE TIME, will have a normal life span, and that it will not fail sooner than later, which in turn, is not good news for the actual CPU which needs the cooling.

So. I get to my questions:

1- Should I go ahead and BUY another CPU (maybe an upgrade to the Ryzen 7 1700X, which will put me back around $320 + tax + shipping to my country + my country's import tax) and replace it? Which in turn will void the computer's warranty (I asume)?
2- Can this motherboard take an upgrade to a Ryzen 7 2700X ( I would think it can).
3- Is it worth the trouble? 
4- Am I right to feel **bleep** and let down with what happened regarding the CPU not being covered by an International Extended Warranty?