Cannot even cancel with vodacom

<p>After being overcharged and logging not less than 6 incidents and queries with vodacom they still debited my account with the wrong amount. </p> <p> </p> <p>Eventually after phoning the callcentre again and holding on a average of 20 minutes i was told there is a credit note. This was two weeks ago and still no avail. </p> <p> </p> <p>When i am calling their retentions department to cancel my cntract you get answered after 15 minutes and as soon as you are being put on hold they call goes to the survey and cut off</p> <p>How the hell do i even cancel my service and contract??????</p> <p> </p> <p> </p>