RMCS and Vodacom - a ********** and ******* contract

What a shock I've just received to learn that I apparently have a contract with a company I've never heard of called RMCS! Only heard this from an almost irritable Vodacom agent at their call centre when I called asking about some services I suddenly don't qualify for! Who are these people? How did they obtain my number? Who authorised that contract that I now apparently have, without my permission? This prepaid number I have been using since 2010 is suddenly not mine? I have no clothing account from any shop as Vodacom suggests I probably signed when I "opened" an account from Edgars or Jet!! I have none of those things and never authorised anyone to get me a R56 per month contract with this RMCS! I need my number immediately and this has to be ******* and the biggest **** ever. Correct this RMCS and Vodacom, I have no contract with any of you.