VODACOM Breach of POPI ACT

I been a vodacom client for over 20 years, I had a 400 minute contract for 3 years. Recently people who I thought was vodacom called saying I was paying too much and they could give be better rates for a 250 minute contract. On the 1 September I tried to make a call only to discover that I had no minutes only to discover that the contract is a data contract only and no minutes can be added. In trying to resolve this now vodacom offered me R50 airtime for the month. I still have no answer on my minute contract. I leave the country on Sunday for a few days. I did not give Vodacom permission to give my details to a third party. Please can someone help me deal with this situation urgently