Vodacom and Like Minds

I have been with Vodacom for 20 years and never once had a problem! I was called by a salesperson, who I thought was from Vodacom, but in fact was from Like Minds. I re-newed my phone contract, but asked to be put onto a month-to-month contract, as we were emigrating. I am now on a different continent, and still being billed for my SA number. Vodacom has reached out to Like Minds, but still no response from them. I don't know where to go from here?