Google Pixel 8a short circuiting? Piwer button no longer works.

Hi, I've been posting about this a bit, but my phone was continuously restarting itself every 30 seconds to a minute, and getting reallly hot in a specific spot (top left under the camera, opposite the power button). Now, it doesn't do it nearly as much (once a day for the past few days), but the power button no longer works so I can't let the phone shut down. Has anyone encountered this problem? What did you do? I brought it to a T-Mobile store (I bought it from T-Mobile) and they had me jump through a billion hoops just to say that they can't do anything because there are cracks in the SCREEN PROTECTOR, not the screen itself. I have the Protection 360 plan on it. Any help would be appreciated.