Paying for a contract I did not open

On the 12th of February I was debited by vodacom I called to inquire as I am a prepaid customer, I was informed that a contract was opened using my details,I was then requested to send in an affidavit and other supporting documentation which I did the following day on the 13th, to this day I do not know how the contract was opened,the branch which this was done, the money to be refunded and how this will affect my credit record,whenever I call I get tranferred from one department to another without a clear solution been given. I dont understand how a contract using someone's details is opened without that person signing for it,evidently a KYC was not performed,this is my last resort before directly contacting the ombudsman as I believe ample time was given to resolve this matter<br>