Mtn contract is a ****

Mtn contract is a **** they made me took a data Sim card on my birthday November 18 2021,for 200 gig 100 day time and 100 night i am paying 250,suddenly all of that changed when my data got finished when I call them they now breaking down my data telling me things they never told me the time they made me take that contract, I'm angry and disappointed how they treat us as their customers, I just need help to concel that stupid contract because it's not worth it,I think I just need to change from this stupid mtn loosers to other networks. Can someone please help it's BONGINKOSI Zulu thanks