Don’t upgrade until your contact is over

I feel played by their telephonic upgrade retention consultants. Now I’m stuck with a bill that I can’t pay. After explicitly asking on more than one occasion, I was assured that the upgrade contact bill would supersede the existing contract bill. To my surprise, I’ve been billed for both contracts simultaneously for two consecutive months. Now I’m stuck with a +- 2000 bill that I can’t afford. If you listen to our telephonic interactions with both consultants, I explicitly asked about this and I was assured that this would not happen.