MTN not responding to queries/issues

I have been battling with MTN issues on both my contracts for months on end now. Have phoned customer care how many times, only to receive promises that they will look into the issues. Have been to our local MTN store also with no luck. Sent an email on 11/1/2016 [#***1], and in true MTN fashion I have not had any response whatsoever. I am due for an upgrade in April - and at this stage I am really doubting if I should continue with MTN as a service provider. Out of desperation I am now turning to Facebook and Hello Peter, as this seems to be the only method to get responses from MTN.