Stuck on a beta android 10

I enrolled in the beta program for Android 10 on my pixel 3 xl , then the program ended and I didn’t opt out now I can’t sideload ota because the bootloader is locked ,I can’t flash official images as well . Also I believe the phone won’t read a sim card because that specific beta build was know for issues with e-sim and stuff  something I found out months after I quit using the phone , now I have a pixel 3 xl that I paid 800$+ from Verizon that is basically obsolete ,I know Verizon doesn’t unlock bootloader but I need help here this phone can’t be used if I can’t install a official android 10 build . 

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