Terrible service from MTN

My childs phone was ****** on 14/03/18. On 15/03/18 a sim swop was done at Diamond Pavilion MTN. It worked for about 24 hours and then started showing no service. The normal useless reply was received from Kobus at the shop that the problem was escalated to their HQ. Past experience proves this as no solution but just a time buying excuse. Later he required us to come in to the shop to do ANOTHER sim swop. We suffered the inconvenience and went to the shop to do another sim swop. It was done and we were informed the sim will work in two hours. It did not. When i enquired about this i was informed that headoffice was now closed and nothing could be done. Surprise surprise. It is now the next day. Still the sim does not work. I get no answer when i phone the shop. This is nothing new. So. After two sim swops i still have no service and nobody gets back to me. Is this the **** service that is to be expected from MTN?? Apparently. Municipality of MTN.