VODACOM lack of service, AGAIN!

I renewed a contract with Vodacom, traded in a phone. First of all they made a mistake on the system and debited the device amount from my account R25k. It was a massive mission to get the money back. THEN, on this same contract they added 2 extra sims in error, which I'm being charged for. Following up doesn't help, I have requested feedback / corrections etc, just nothing.