i had a similar situation of being overcharged for a device (by $800) which was a huge error on their side. they did not fix it and refused to fix it. so what i have done is ported the numbers out, and canceled my service. over the next 57 years, i will be paying them exactly $1 a month. since I am actively paying on it, and there are no finance fees or anything, according to their finance department they cannot report it as a bad debt. Its just my little form of protest towards them. (until i can find someone in the company that will remove this fee)