Angry client

About two or three months back Vodacom made me pay money for month to month subscription which they blocked my number after talking to different people who gave me different amounts of money to pay. I paid everything and told Vodacom I do not want any contact anymore. Now am receiving emails to say I must pay R250.00. Can Vodacom please cancel the month to month subscription I do not want it. I want my number to be prepaid. Had to get a new SIM card because for 3 weeks I did not have my numbers