Poor service

I am struggling for 11 days now. They cut of my cellphone. I have all the proof of payments. Still they can not tell me we're do I owe them. Every time you need to phone customer service and then either the call gets drop or you have to email it again. The poor lady working in Brooklyn tried to assist but she can not even help me. Every time they tell her a different story. Feel so sorry for the staff that actually care. Still problem is unresolved after spending the entire day at a branch. Still nobody can assist me.