Settlement letter!

My virgin Active account was handed over to MBD. I made payments to them. the last time i called them was when i asked for my balance so that i settle the account.I was told that i needed to pay R78, i made payment of R80 and called them to get a settllement letter and was told i would get it within 5 to 10 days working days! That has not happened.<br> I called again enquiring about the letter but was told that i owed another R75. Really? <br> My arguement here is howcom i was not told about it when i called about balance? Why was i promised a settlement if i was still owing them? I called MBD for the recordings of the call telling me of the amount i owed but still no feedback.