I go to my ASUS and select contact ASUS. then I select the model number stand they open a website in which I fill up all my device information plus my name email and phone number, when I press start chat they tell me " IMPORTANT! Warranty Support and Repair Information
Thank you for being a valued ASUS customer. In the unlikely event that your computer requires warranty service, please contact Best Buy for support at 1-800-433-5778 or visit: https://www.bestbuy.com/geeksquad
For general Self-Service or to obtain general product information, or to register your product visit: www.asus.com/us/support " and don't let me start a chat with an agent. I have an account with the same email I provided, the only weird thing is that my device appears to already be registered. I bought it used from best buy and it is still within warranty. if anyone can help me I would very much appreciate it.

Ive been using an Asus Tuf Gaming A520m Plus Wifi paired with an powercolor Rx 6800 (4 months out of warranty now) for 2-3 years now, and yesterday I turned my computer on only for the pcie slot to smoke and completely destroy itself & my gpu with it, asus is completely willing to replace the motherboard, but says there's absolutely 0 compensation they can give for my 450 ( at the time) dollar graphics card, because it's not an Asus product, am i just screwed or should I keep pushing?