How to remove stripped T2 Torx recessed screws on the bottom?

I have a OnePlus A3000 Phone that needs a screen replacement. It has two screws at the bottom, but I cannot get them loose. They are T2 Torx screws, but they appear to be stripped. They are recessed in the phone housing, so I can’t grip them with a set of pliers. How can I remove these, and where can I get replacements for them?