Debit order set-up without consent

On the 1st August I woke up to SMS's on my phone from my bank regarding a transaction that went through my account from Vodacom for R761.93<br> <br> Firstly, I only allocated sufficient money to that account for 2 of my website domains that get debited from that account, therefore there was only about R100 in the account.<br> <br> Secondly, I had not given Vodacom ANY permission to set-up a debit order on my account.<br> <br> Thirdly, After trying to deduct R761.93 (which was not available) my account was penalised a failed debit fee leaving it with a minus balance and therefore I did not have enough money in the account for my 2 website domains to get paid. These debits therefore also returned unpaid.<br> <br> Now I need to, transfer money to that account to make up for the minus balance PLUS transfer money again for my 2 domains and then setup a resub for those 2 debits. Fortunately my services with the domain host have not been suspended!<br> <br> I wan't answers as to why Vodacom set-up a debit order WITHOUT my consent. I will also look into legality of this as well as my rights accodring to CPA.<br>