Exceptionally poor service standards at MTN

I sincerely regret being an MTN client, it's been 20 years of less than mediocre service. The appalling customer service does not make up for their over priced offerings either. I ran out of data and purchased 2gigs via the Mymtn app. I received an email confirming a successful transaction yet no data was forthcoming. My nightmare started just after 9am yesterday morning and I am yet to receive the elusive data. I have instead received no help from staff that are rude, uninformed and unhelpful. On enquiry this morning I was told that they have no record of the 8 calls I made about this matter and I should expect it to be resolved in 72hours. Unbelievably, I needed to purchase additional data to email the confirmation received from MTN back to them. Furthermore, Yolanda at the MTN switchboard at its head office took it upon herself to terminate my call as she felt that a customer service complaint did not warrant her time and that she would not divulge the name of the person responsible for customer service at the organisation. I am at a loss. I have conducted my MTN account in an exemplary fashion and I feel so disheartened when I hear the call centre person ask "how may I brighten up your day" because I just know from experience that there is only a customer service nightmare ahead. I recently read that MTN lost a significant portion of their customer base, I think they should add the 3 numbers I have to it. I have already started doing my homework for a new cell phone network - any suggestions?