Poor systems and very poor service from MTN.

So according to my MTN mobile app and the MTN website I am eligible for upgrade today the 30 Nov 2023. When trying to complete my upgrade online I receive errors stating I have to wait until today the 30th of Nov 2023. I tried to call the customer service line 135, spent an hour on the phone with them to hear sorry we can't upgrade the contract as you are not eligible. Super unhappy with the service and strongly considering a switch to Vodacom.