Contract Cancellation *****-Up

I was originally on Nashua Mobile and then got moved to Autopage earlier this year. I queried if my debit order will work as normal and was assured it would. However it did not and I had to call Autopage to find out if I owed them money as they never sent invoices and I had to make use of EasyPay at times. In May I decided it was enough and emailed to find out about cancelling my contract, they sent me a contract settlement quotation of R1482, I went to the Brooklyn Mall branch to find out if this amount is all I need to pay and they said yes. So I paid on 22-May and I faxed proof thereof on 26-May. I also phoned to move my contract to prepaid and they assured me this would be done and that my contract was cancelled. Then 30-May they tried to process a debit order which should not have happened if my contract was cancelled?? And now I phoned to find out why this happened and why I am not on prepaid yet and now they say I must pay R7232 to cancel my contract? What *******! I can not afford to pay this money and I am so fed up with Autopage. What a nightmare.