VODACOM DOES NOT CANCEL CONTRACT AFTER CANCELLATION WAS PAID

Firstly I waited in total about 60 mins for someone to talk to me I had a consultant laugh at me, I then get told that after I paid cancellation figures that the relevant contracts were not cancelled from Vodacoms side and they cannot guarantee that I wont be debited yet again this month. also why did I wait for the new month to call Vodacom?? really I made the cancellation payment for 3 of my contracts I also forwarded all the relevant documentation on the 17.10.2017 then on the 20.10.2017 got debited again because apparently the cancellation figure was given after there statement run, now to find out that the contracts are still not cancelled ?????????????? SO what am I going to debited again on the 20.11.2017 for something I paid in full???????