Verizon won't let me back to work due to confusion over Met Life doctors

I am out on Std claim thru verizon my employer and Metlife the insurance co they use. My dr released me back to work in beginning of January so Metlife had me go to one of their dr who said no I can’t go back yet give it three months. I go to another Metlife dr who releases me and now verizon says they need more questions answered by the dr and will not let me back . It’s been two weeks (Monday) and I get the run around when calling MetLife saying they received a fax from the dr but wasn’t what verizon was waiting for. I call everyday and no changes. My Std runs out next month and I don’t know what to do to get back to work. Released but I’m not working and getting no answers.