I ported my no. in May and MTN still bills me!

I ported my number to Telkom in May 2015, and MTN billed me in June and then July when my account was closed! I have sent over 20 emails to MTNs customer service department since June, asking them to call me and resolve my complaint, and they have not done so once. I have complained on hello peter, to ICASA (the telecoms regulator) but still they bill me and do not close my account.<br> <br> This week I have even received two phone calls from MTN sales people telling me that my account is still open and I am due for an upgrade!! Sanele Nhlapho in customer service has ignored all my complaints and will not take ownership of my query. Today i get a reply back from Vuyokazi Muambo telling me to call their call centre. Really? So after 3 months and 20 plus complaints with no response i must call you MTN?!<br> <br> The incompetence of MTN's operation is matched only by their appalling, appalling customer service. I would not recommend my worst enemy to use MTN. Forever and a day now i will associate MTN with bad service and incompetence.