Poor network connection

I took a sim and router deal in May. Ever since I've had this sim card, I have been struggling with connection, I have called mtn more than 20 times asking them to fix the issue because their connection hasn't been reliable. I finally got tired because I was sometimes told that on their side the connection looks perfect and I explained that I do not dispute that, that perfect looking connection does not last for even 30 minutes and I study online so I constantly have to buy vodacom data on top of the monthly payments that I make to them. I then decided to cancel the contract, I have been sent from pillar to post just to get a quotation so I can pay and get the contract cancelled. I reached out to ICASA and I was given a reference number and informed that the matter was escalated to the MTN consumer affairs for investigation. I am still waiting for a response, I have not been contacted by anyone ever since and I sometimes wonder if these aren't just tricks to keep me paying and be stuck with them for as long as they want because their data is not working. I don't even think I should be paying any cancelation fee, the day they decide that they want to cancel the contract because this is not cancelation by choice but by poor service that they provide. I am more than disappointed in mtn, I even failed one of my school tasks because I re**** on mtn and it just stopped working and I failed to submit.