I DONT HAVE A CONTRACT WITH VODACOM,REVERSE MY MONEY PLEASE

Vodacom keeps on debiting my bank account, yesterday they debited my bank account R5986.11, the worse part of it I don't have a contract with them, this is the second time in the month they did this. Can they please reverse my money,because two weeks back I send them the affidavit from police station, my ID copy and three of my signatures because they said they wanted to confirm. I still say I don't have a contract with Vodacom. I want my money. I would like to believe that I am dealing with **********