Very wrong done by long term Vodacom client

I have been fighting with elite mobile who called me on behalf of Vodacom to do a migration for me. I was advised that my sms's will be converted into more data as I don't use my sms's. I wasn't advised my bill would more than double.

Now they are saying I am liable for the fees. I would never agree to take on any extra amount.

I'm at a loss and need to know where else I can escalate this to.

Elite mobile are positive the agent advised me and was compliant.