MTN NOT RESPONDING TO DATA CHARGES OR EMAILS SENT

This is my second report on the same matter that to date still has not been resolved.I have had it with MTN's incompetency and poor service.I want my account closed, handset handed back and go to another service provider. I received SMS's in this sequence to inform me that my account is overdue and services suspended as well as legal action threats without them resolving the overcharging of the data usage, how *********** can a company be, its laughable!25-Jun-15 1:47 over due warning|25-Jun-15 1:48PM overdue account warning. I sent a complaint email on the 25th June 15 regarding the data charges as all the calls to the service center did not resolve the issue, to date I had no response except for the auto response.7-Jul-15 11:17AM outgoing call facility has been suspended|10-Jul-15 05:59 AM pay to avoid a negative credit rating|13-Jul-15 10:13AM pay R24443.05 to avoid full service suspension and legal action|13Jul-15 11:18 account overdue.Please pay R24443.05 to avoid suspension.1 Day warning given.The last SMS received 14Jul-15 06:58AM informs me that services are being reinstated. I do not know what to do anymore do not use them as your service provider, they will RIP you off.