Stripped screws.

How's it going fellas. I recently bought an injora 11kg steering servo for my SCX24 JLU, and I was going to take off the high clearance links i installed. When I realized they where just spinning and not coming out lol. I thought I was being careful enough on the reassembly but I guess not. Any tips on how to get this out? Or even is it salvagable? Thanks, boys