Poor Service and Failure to resolve account issue

In May my contract was cancelled with Vodacom BUT the value added services was not. For those that don't know what this is, is Rescue Box & Hotspot that somehow got linked to my account as I did not sign for these products. After cancelling my contract in May, they have still been deducting amounts from my account and have been struggling for the last few months to get it resolved with Vodacom. I have gone into several stores, gone to my bank to cancel debit order which they need proof from Vodacom that it's cancelled. I have logged a query with a reference a month ago, and this is still not resolved. Initially when I called thru the turn around time for refund and resolving of issue was going to be 7 working days. Query logged on 08/08/2017, another on the 04/09/2017, 05/09/2017 & 27/09/2017. We are now on the 27/09/2017 and nothing has been done so far. Upon phoning the Vodacom call centre, after getting put thru from pillar to post, the best they can do is call back, which I highly doubt will happen. This is my last resort to try and get this issue resolved.