Mtn is ****ming people and they are refusing to take responsibility

Mtn doesn't want to take responsibility.

I opened two cases against MTN, the first one was for the month to month home router and the second one was from their online department. I bought a router on a 12 month contract and I was told that when the contract ends I may keep the router, but then I decided to cancel the contract after it expired and became a month to month contract. I was told to return the router which I did but they refused to cancel my contract, while the router is back with them. On the other hand I bought a router on the 24 months contract December 2025 and I was told it was going to be cheaper the the one that expired (which i was paying R378.00 monthly for), I was also told that I'll receive the potable router which would be inclusive to the monthly payment that was supposed to be R300 monthly and was going to be linked with the home router, only to find that it was a different deal altogether then my monthly payment skyrocketed from what was supposed to be R300 per month to R1300 per month. I opened to cases against MTN and they said they'll come back to me within 72 hours but now it been 5 days and no response, can someone please help me.