My wife and I signed up with Verizon back in March. She got the iPhone, I got a Thunderbolt. The device had a lot of problems and I received a replacement device in June. That device had a problem as well and was replace in September. I sent back the faulty device on September 12 and they received it September 14 (FedEx tracking #875288907070) however they keep sending me messages that I am going to be charged $569 for not returning the device to them. I have spoken with 4 different representatives as well as their "Twitter Team" and each time there is no resolution. Each has filed a request for the warehouse to locate the device but nothing has happened. They say I am going to be charged on Nov. 4 for the device THAT I SENT BACK. What should I do? I've considered the BBB, my state Consumer Protection Division, etc. Has anyone dealt with them? Advice?