xm5 headband broken

This part of the headband of my headphones popped out, and i cant seem to pop it back in somehow. Is there anyway this is repairable? Or any stores that can repair this? and another thing that i dont think is fixable hut while im at it is there a way to get rid of the kind of burn marks thats there i left it on my shelf by a window and it got .. burnt?? apparently??