Vodacom contract locked with no arrears

I've had a vodacom contract for a year but have been locked out for 7 months of that because of vodacoms incompetence at being unable to remove an initial mandatory call limit month after month after month.<br> <br> I refuse to pay another cent other than the capital amount owing on the phone. I called in to cancel today and was told I had to speak to the legal department. Was transferred and the line dropped.<br> <br> I would like to cancel my contract asap as you have not given me the service I have paid for,