Vodacom's incompentents

I canceled my contract in Feb this year and paid the cancellation fee in full, after a number of calls and months I finally found out that the cancelation was not processed. Someone didn't do their work ……… so it was finally cancelled end of Aug great ! but Vodacom still had the cheek to take money off my account for the months that the account was "Active" ? so now I am paying for someone's ***********s which is very unfair. I spoke to a manger two weeks ago and he promised to have the problem resolved and issue a refund still nothing, I am extremely fed up ……..