Unauthorised Debit Order

On the 29th of February Telkom Mobile debited an amount of R1800 from my account.<br> After calling them (and holding for 30 minutes) someone told me I had taken a contract with them and an iPhone 6. I don't understand how this can happen when I've never even spoken to Telkom nor have I provided them with any documents. Please clarify what happened and please remove my name from your systems because I have not and I do not intend on having a Telkom Mobile account.<br> Please also let me know how you went ahead with a contract without all the necessary documents!!