No response to previous complaint

What happened to MTN hay? I use to tell everyone how other service providers werent worth the time and MTN was the best in both service quality and customer service but now it seems MTN has ditched all that just for greed, I have a previous hellopeter complaint logged and in that you respond saying you have tried contacting me multiple time, well firstly someone tried to phone me once i was in a elevator and there is no signal there so the call didnt come through all i got was a sms saying i had a voicemail and when i listened to it it was MTN only they didnt leave a name they didnt leave a number or reference for me to follow with and that was it never again have you tried phoning me ontop of that around the 18th of june i came went into the gateway branch to change my billion address i sat for nearly an hour and made it to the front only for the teller to call a group of girls behind me who seemed to be his friend so i left i had used my whole lunchbreak for nothing i managed to change them much later on but it was to later it was after the date you bill people so now my account it unpaid and my phone has been cut off. Great services thanks I will be going to another provider.