Horrible customer service

I am really annoyed with Vodacom cancellation department service. I cancelled my contract on the 12 of June 2020 but they didn't cancel it after paying all the money that was due to them and signing cancellation form. On the 12/13th of August 2020 I wrote a review on this page they contacted me promised to resolve the issue. Surprisingly after so many phone calls and blocking of contract SIM card,the contract is still active and owing since June.