A few questions regarding a 2005FPW

So I recently bought a Dell 2005FPW LCD monitor (purchased july 1st of this year) and I've gone through 3 replacements and the one I'm currently using seems to have the LEAST amount of backlight leakage on it out of all of them. I figured that I'd keep it because of that reason, so the other replacements all got shipped back about a week and a half ago. Now I'm starting to notice on light colored backgrounds such as white and grey that I can see two dark "spots" on the left side of my screen. They aren't completely black, and they aren't dead pixels (they're larger than single pixels), they look more like 2 small circular smudges. However, I tried wiping them off to find that they aren't "smudges" after all. Typically I wouldn't have noticed this (since it took me a week to notice it in the first place), but now that I've seen it, my eyes go straight to it every time. If anyone wants/needs to see pictures of this phenomenon for further examination, let me know and I'll link you to the picture.

So, on to my question(s):
It's been 18 days since I've purchased the monitor. I know there is a 3 year warranty on the monitor regardless, but I've heard there is a cutoff time for swapping for new monitors. For example, if you ask for a replacement after 21 days, then you start getting refurbed screens instead of brand new screens. Is this true? If so, what is the cutoff time?
Secondly, is there some possible way of me setting up a replacement without having to go through the most counter-intuitive phone tech support I've ever encountered in my lifetime? The first time I called up there it wasn't too huge of a hassle other than having to wait on hold for 45 minutes and then having to talk to a technician for 20 minutes to have me troubleshoot things I already said I'd tried. However, the second and third times I've called, it's all voice command stuff and asks me for a service tag which is non existant on monitors (I don't have a Dell PC) and won't forward me to the correct department because of it. I finally found a way to get around it, but seriously you guys need to consider those of us who don't own Dell PC's but buy your peripherals as much of a customer to you as the person who DOES buy a PC from you. So is there a way I can set up a replacement shipment without calling since the online chat also seems to require a non-existant service tag or am I going to have to go through an unnecessary hassle that will make me want to return my monitor altogether?

Thanks.