Worst telecommunications company in South Africa

This must be the most useless company in South Africa. A year and a half ago I advised Vodacom that although I was paying for a data package I had no data. After about 8 calls to the call centre ( most of which the agent promsed to call me back but did not) I complained on this site. They advised that they had called me which was false. I then discovered that they were calling on a data only line - NOT VERY SMART FOR A TELECOMMUNICATIONS COMPANY. Still getting no response I complained on Facebook and for once they were responsive. They advised that they would get back to me. After two weeks and no further communication I took it up with them again and they advised that it takes time. At this stage I told them to cancel as purchasing mobile data and setting up mobile hot spots to work was getting expensive . Two weeks after this and after I had entered into another data contract a technician called and I told him not to bother as I had another contract. I now am getting calls and letters saying I owe Vodacom. My responses to all of these emails are met with no response. In fact I believe they owe me as I was paying for a service which I was not getting and I have spend hour of my time sending mails and previously calling their call centre. DONT DEAL WITH VODACOM THEY ARE WORSE THAN USELESS.!!!