MTN WORST SERVICE PROVIDER

We have been trying to cancel a wi-fi subscription after the contract ended without any success. The branch cannot help and referred us to 135. Unfortunately we failed all the security questions and they refused to assist us any further. The reason why we failed is that we moved addresses and our e-mail addresses have changed. They did not give us a chance to even explain anything. I went to Facebook and my query was being handled or so they advised. Numerous messages received that the matter has been re-escalated, and that's it. Nothing further. Now our lines have been suspended. Nobody is taking responsibility for this. I've paid the account (just not the wi-fi). We are clients for 27 years. We will not renew any of our contracts.