Unlawfull debit order

On the 29 of February 2016 my Absa account was debited an amount of R99.99 ref no verdiva / 24575649 sage, I want to know who gave them authority to debit my account and when did i speak to one of their consultant now i had to call Absa and find out what happened for their mess and be charged,In my case Verdiva used Sage Pay to access my account without my consent. The police should really investigate this company. How do they get our banking details in the first place is just beyond me because I do not recall receiving any calls from them or giving them my information. Something needs to be done about this company, i am tired of these companies trying to rob us our money, almost every month there must be a companies that plays to my bank account without my knowledge, i notice even R10 on my bank account, these criminals must be arrested, i sick and tired of this and i was my bank charges to be paid.