Incorrect Billing - no way to sort out with Vodacom contact channels?

I was sold a new contract in July with the promise that I will pay less every month. The next day I got a SMS stating that I will pay more. I reversed the transaction and contract with Vodacom and all seemed to be sorted. However, this month I get billed 3* more than what I should be. (2 months after the contract was reversed) Went to a Vodacom shop to query my account to be told that the contract I was sold incorrectly has been re-instated. I tried using the self service portal (TOBI) and tried speaking to an agent to get this sorted but seems this is impossible with the new channels. Can someone from Vodacom get in touch with me? I have been a Vodacom customer for 30 years!!!