Vumatel bad service

Where do i start u have had nothing but issues with Vuma since day 1 of signing up with them. The salesmen was so in a hurry to capture the sale that he has captured the incorrect information. When i have had a look at the details i found that the contact number submitted on my account was incorrect and i kept on asking them to change it yet i got **** customer service now i have been trying to cancel for couple of weeks and they dont want to cancel my service i do not owe them a cent and i have had a month to month contract . I have sent a number or emails and i get a response as they tried calling but couldnt get through hence why i tried giving the correct number. Can i please get this resolved