cancellation of contract.

I am trying to to switch to a pay as you go, i have about R1095 airtime and 280MB of data. I am in the process of porting to Vodacom. i cannot do it unless my contract is changed from contract to pay as you go. i have had a long battle to renew my contract without any joy and that is my main reason for changing from MTN to Vodacom. <br> <br> i have various reference numbers with promises of being phoned back. so far, nobody has phone me in a week. Ref *** was the last one. to phone them involves holding on for nearly an hour at a time. i want MTN to change my contract to a pay-as-you-go, their delays have caused me to having to pay one additional month. This has been going on from the first week of January 2015.