Unauthorized debit order

<p>I ported to another mobile service provider end of June. I paid the Vodacom settlement and they debited me for the month of June. No problem. Last night they debited almost R3000 frmo my account, even though I no longer have an account with them - I am no longer a Vodacom customer - not since end of June. called them now and after being cut off twice after holding over 20mins they realized a number unknown to me was added to my account (which I don't have) and I was debited for it. Now I have to log a dispute and get an avidavid for something I had nothing to do with. </p>