Horrible service

I bought a R200 gig from mtn in December however I could not use because I kept on getting a depletion massage, I then bought another one now in January and still gives me the same massage meaning the 400 gig that I bought with my hard earned cash i cannot be able to use it. I have tried calling the mtn customer number for assistance however you can only speak to the IVR, I then sent an email to the customer care for assistance which took a week to get a resolution that is not even working. They told me to dial *137# to migrate to super data price plan, however the ussd keeps running until it says wrong mmi. Then tried to login to the mtn app and I never receive the otp number to login. I guess my R800 is gone down the drain since mtn itself cannot be able to help, now the only thing I have to do is destroy the sim card, how people who are using mtn are surviving with such poor network is beyond me. You telling us about good staff but there is no joy at all with this network what so ever, no sympathy with my money from mtn it's really heart breaking