I returned a broken set top box to a Verizon store in August -the same day I recieved a replacement. I keep getting billed $16.99 + tax for this box every month. I call and give all the information from my return reciept, the agent credits my account and assures me that the problem is solved. Every month the extra box shows up on my bill. How do I get this resolved once and for all? I even got a case ID from an agent but the next month another agent said the ID# meant nothing. Help!!!!