Exposed Verizon cable

A couple of years ago Verizon installed a 5G cable in front of my yard. It has activated a sink hole, and now the cable is exposed (about 2 feet below the surface). My landscaping company has offered to fill it in with stones (for a large fee), but I suspect Verizon would want to have a say in it. There is a junction in the hole,  so they might want to be able to access it and stones would make that difficult.

I can't find who to contact. Any ideas?