Unlawful debit order

Lets Connect has illegally debited my bank account. I had never heard of this company until they took my money. I am just wondering where did they took my banking details from, others says it is Digicash it went off on the 29.02.2016 for R99.99 and this is not for the first time they did this, almost every month there is a debit order of R99.99 taking off from my account different companies, i really think its time i open a case to all of these companies and i still have proof of these companies, I want them to also pay my bank charges. I just wonder if these companies are recognised because no company can just take debit order with out our knowledge and no reason for that debit because i am very careful with my finances, It looks like some unethical telemarketer is driving up sales with my hard earned money and this is purely fraud.