Vodacom Red premium complaint

I have been receiving very bad service from Vodacom. My account has been debited with R8700 which no one seems to know why but I’m not getting any resolution. I’ve had the problem from end June and I’m sent from pillar to post with no feedback, dropped calls, no resolution & this is affecting my credit rating in a bad way. From customer service, account collection & subscription to finance/risk. I’m at the end of my tether with them.