no response

It is now almost a month that i am battling with the signal strength and I cannot use my modem... MTN refuses to cancel my contract. According to them I only have 7 days to cancel a contract. So, now I have to pay for something that I cannot use. I got a standard response from them and although I provided the reference number of my previous complaint, I haven't heard anything from MTN. <br> I have always recommended people to go to MTN if they have problems with cell providers but I will NEVER make that mistake again... This is completely unacceptable and unprofessional!