MTN continues to debit our account 10 months after cancellation

On 25 May 2017, we cancelled an account telephonically with the call centre, with termination on the 30th Jun 2017 - ie well over the 30 day notice period. To-date, we are still being debited monthly for this although many calls and emails have gone to ********** and promises have been made to cancel the debit order and refund the monies to our account. Cell nos : ********** 371, no longer exists, so we are not able to cancel this on the self service menu and the customer call centre nos does not allow for us to speak to a HUMAN to resolve the issue. In 24 hours, this issue will be addressed via Social Media, unless we have a response from MTN and if necessary further action will be taken.