Port out is a NIGHTMARE!

I want to port out my 2 numbers away from Xfinity. I have been on calls with Xfinity agents for 5+ hours now. All they do is say that they can only provide the port out PINs. Despite double-checking and confirming EVERYTHING, the other provider still said that the previous carrier (Xfinity) rejected the transfer request. Do I need to file a FCC complaint to get this resolved?