Cancellation of contract and conversion to prepaid

I cancelled a cell contract with Autopage and requested the number to be converted to prepaid. This was done in May 2015 already with the contract only expiring on 16 July 2015. I received an email back confirming that this will be done on 28/7/2015. I phoned Autopage last week and today again and this is still not done, the explanation is that it is loaded for 28/8/2015. Unacceptable!! <br> <br> Reference number: 679843<br> <br> Autopage, please assist to sort this out!!