No followup or resolution from MTN after paying my hard earned money for something that doesn't work

I purchased a Super flex SIM card from MTN it took over a week to arrive when it did arrive it wasn't RICA'd so I had to do that myself. After the RICA I discovered that the benefits were not loaded and that the card wasn't active. So I phoned into the call centre where told me to wait 12 hours. I waited and still same thing nothing working. I called customer care again and they told that they logged a ticket and that I should wait 24 hours. After waiting another day I called in and still no help. Instead they told me to wait 7 more days for an investigation claiming that I never paid. I have emailed managers at MTN I have even messaged them on social media. I've followed up with customer care several times throughout the week and I am just sent from pillar to post. Nobody at MTN in all of their branches seem to know what's wrong. I regret the day I purchased this card. I'm at the point where I feel like they should just keep the money and I'll never make use of their service again. Disgusted appauled and just downright fedup with the lack of accountability and the proud display of negligence and incompetencey.