Failure to cancel my contract as agreed on by Vodacom

Extremely poor service, i have been struggling with vodacom for over 2 months now with a deal they sold me that was not the deal we agreed upon. They then contacted me and after some time we came to an agreement that they would cancel and collect my Product. One day after they said this they sent the courier company and i was told it takes 3 to 5 days to process this we are already in the 7th of the next month and nothing has been cancelled from the 19th of the previous month. They have already debited me for a product and service i dont have anymore. When i call customer service it has not been updated on there side as they keep referring back to my initial complaint saying that is still under investigation yet they already collected my stuff with no recollection from there side that it was collected. Now im at a back and forth with customer service and a new person to speak to every day but im not getting feed back getting tired of following up with vodacom on something they need to sort out on there end.