No answer in almost 3 weeks

I have sent an email as I have done in the past to cancel my MTN contract following a conversation telephonically with one of your staff.<br> Contract termination date was 14 March - I sent an email on March 27 stating all details necessary to ensure the contract is terminated I am not billed again.<br> No response. No pick up at call centre.<br> Mails subsequently sent: March 31, April 3 and today April 15<br> <br> Mails sent to: [Email Removed]<br> <br> I have yet to receive a response or confirmation neither have I been able to reach anyone in your call centre. I hang up after about 20 minutes to half an hour waiting.<br> <br> Get this sorted out NOW!<br> <br> I expect my last debit to go off on 01 May and after that nothing again.