poor service

i was retrenched last year due to Covid 19, in October I was suppose to do an upgrade with cell number *** but I went to the branch more than 3 times asking them to cancel my contact because of affordability but it went into deaf ears, a lady from MTN called me few weeks back saying that they wont cancel my contract rather they will give me 5 gig and i will pay R50.00 so I agreed but now this month I am still being charged the same amount I have been paying all this time. I am not happy about this matter , please I want to cancel this contract permanently, you guys care about your business and not your customers, this covid has affected us badly and all you care about is money and making us pay more than what we can afford.