************ Mtn try to ****** me

So i have been with Mtn since July 2011.In Jan 20 i upgrade to a data and and airtime contract without any handsets and kept my end of the bargain by paying my acvount regularly without fail. The contracts were set to lapse on the 20th and 29th of Jan 2021.

On the 20th of Jan Mtn sent me email telling that i was up for an upgrade and can contact call centre . I checked their deals and wasnt interested in any of their deals I continued to use both contracts getting the data and airtime that i had been contracted to receive and continued to pay the montly fee of R700 per month

Today i got the shock of my life when i discovered that MTN had billed me R4200 and they claim that I was now being billed out of bundle rates hence the the bill had skyrocketed to this amount . My gripe is Mtn increased data bundle rate without informing or telling that my account will be charged at a higher rate. Why does Mtn not inform clients that they will be charging them more money . In their upgrade email there isnt a mention or option of cancelling contract or stating that you will be charged at a higher rate.

This is so disapponting from a company that i have supported for all these years