Upgrade is not the contract we signed for.

My wife and myself upgrade in June 2019. From the first month we received wrong data, airtime and sms's and the amount we pay is R169.00 per month more than the contract we signed for. I complain at local, area manager and customer complains without any success. I am with Mtn for over 20 years but with this experience of bad service i will end my contract at the end of this 2 years. Every month they took in total R338.00 more than we signed for.