I got screwed in a purchase and return with another cell phone company. I have the reciepts, showing that I returned the phone and canceling the service, the company first sent me bills for the service, and I told them that I canceled it, and returned the phone. 30 days later I got a bill for the cost of the phone. I showed them the receipt for the returned phone, they said they need some kind of verification from the cell phone store, the receipt they gave me proving that I returned the phone wasn't good enough. The bill for the phone went to collections, I challenged it, no one has contacted me about it since.
The MSC was EXACTLY zero help, they told me they aren't responsible for the mess.