Atrocious service from MTN and NO FEED BACK WHATS SO EVER

I purchased airtime using my FNB app as I always do, upon purchasing R90 worth of airtime I was sent a message by MTN saying that I was accredited with what I had purchased. I then went about buying a data bundle and was informed that I have no funds to do so, checking my balance I saw that the airtime was not accredited to my account, I then checked my FNB APP to see if the money had come off and it did. I phoned the help line only to be spoken to on the phone rudely and as if I was to blame, a manager suggested I wait and see if it would come through and if not MTN would then decide if I would be accredited with the airtime I had purchased or not meaning they would either accredited me with the airtime I had purchased or keep the money. I am furious with this service as they did check on their systems and noticed these faults. It’s been a week and a half and I have not hear from them nor have I received any compensation. For this I give MTN -5 stars and am considering changing networks as their service is not up to a standard in which I a paying customer deserve. If this is how you chose to portray yourself then I want nothing to do with MTN I will take all my contracts elsewhere.