I opened a new XXXX account on XXXX XXXX, 2015 and returned the device and cancelled the contract on XXXX XXXX, 2015. This was within the 14 day grace period as specified in the contract. I began receiving bills for an Early Termination Fee ( {$420.00} ) shortly after, and I contacted XXXX on XXXX separate occasions, once on XXXX/XXXX/15 and XXXX on XXXX/XXXX/15 where each time they assured me that the ETF was erroneous and would be removed. 

On XXXX/XXXX/15 I was contacted by Vantage Sourcing , LLC, a debt collector, claiming I owed {$420.00}. I have contacted XXXX many times since then, and after many hours on the phone they still will not remove the charge or even allow me to mail them proof that I returned the device and cancelled the contract within the specified grace period.