Cancellation of contracts

On 28 July 2017 I contacted the call center regarding the early cancellation of my contracts as we were moving abroad. I was provided the cancellation fees which I then paid at the MTN store. I then contacted the call center again and was requested to send through the receipt which I duly did. Even after numerous follow up emails the accounts are still active. It is impossible to call the call center from overseas so how is one supposed to get this issue sorted out?