Force to pay just for getting quote

I had internet at Telkom last year for about two to three years and never stopped having problems with them. 4 February 2015 I cancelled my services with them because I had to relocate. The lady told me it is immediate effect and I don't need to pay the end of the month of February 2015. I got an invoice again and phoned in. They said there was a technical error and will cancel it again the 18 th of February 2015. I was told that my account was in credit and that they will contact me for banking details. Never happened. I phoned May 2015 for a QUOTE in my new residents and the next thing I know they send out technicians to install a land line. Before this they send me messages to confirm the date and if anything was not in place I should reply with @no. I did like 10 times. No reply. I tried to phone them like 100 times and never got through. When the technician came to install the line I said no because I did not give the a go ahead. Now I have a monthly bill for my telkom account with no line and no go ahead. What is wrong with these people??? Can they not hear or read. Their systems is up to bs.