Unauthorized Debits

Triad Global Services has been debiting my account for an amount of R99.00 for the past 5 months via Digicash. I called digicash asking for the contact details of Triad Global and the number they gave me doesnt work. I managed to get other numbers from the internet, they are also not working. They use a different ref number every time they debit which makes it difficult for me to track and stop the unauthorized debits. anyone who has/had a similar case please help. I want my money back. Im not receiving a service from them, I dont know why are they taking my money.