Here's the story...

Plan: Family plan with three lines. My line, girlfriend/ex-girlfriend line and gf/ex-gf's sister line.
Ex-gf lost her phone. Bought a Nokia 6600 at a dealership worth 450. Returned the next day because she didn't like it. She wrote a check for it. We discussed the refund with the dealership and decided that we'll just put a stop payment on the check instead of waiting for 3 months just for a refund. 3 weeks past and bill came and there's additional 450 charge for returned check. I called customer service and they told me to either a: fax the return reciept or b: go back to the dealership and have them take care of it. I did option a first, waited for a call from them but to no avail. Went ahead with option b and dealership started talking to them. They said they will take care of it. Dealership called me back and told me that it will take 4-5 days for the credit to show up in the account. I waited for 6 days and called back customer service and asked if credit has been applied. NOT YET. They said that the dealeship needs to fax something from them to get it processed. I'm very aggrevated(spelling) by now. I called dealership again and dealership felt mad too that customer service hasn't took care of it. He asked them why this hasn't been taken care of. Customer Service said that the infos were forwarded to a superior. Dealership was on hold while on the phone with customer service and he told me that he will just call me back after their conversation. He did mentioned that everything needed was faxed from me and him and there is no reason that this is dragging. Waiting for a call back from him now.

Now the due date of the bill is in 4 days. I will not pay it with the additional charge. But I don't want to have a bad credit also. Was thinking of cancelling the service but I have to pay 250 or so because of contract.

Has anyone had this experience with T-mobile before? Or anything similar.