Cancellation of contract

Good day<br> <br> I have tried numerous times to switch my contract over to prepaid but to no avail. <br> <br> First i was told I need to call a month before my contract ends to cancel my contract. I did and was told to call back on the 18th December. I did this too and was told my contract will be switched to prepaid. This was supposed to take approximately 24hrs. I then called back a few days later as my contract airtime was topped up again. <br> <br> Its two weeks later and I receive a statement for double the original contract amount. No details just figures. What the hell am i being billed for???<br> <br> Now im being told it might be an error on there side yet I have to do an investigation to prove them wrong. <br> <br> I call ********.<br> <br> During all of this my contract is still not cancelled. And as an extra bonus my contract was increased mid term from R289 to R299 without prior notice. <br> <br> At this point in time im seriously considering switching service providers.