debit order on my account without my knowledge

on 30th of March 2015 my fnb bankstatement shows an amount of R99.99 been debited ref no verdiva ***7 sage 150330,i don't have any idea about the company i called them @9:17 and spoke to Shantell she said that she will send the query to their investigation department it will take 7 to 14 working days to get feedback,i am ****ed off because 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 fnb and find out what happened for their mess and be charged,next time or if ypur company is ****** please look at the people that you can mess with their account,i don't want **** on my account and i have never joined any kaak products with you.