Incorrect billing

I decided to join this club. They give several billing options. I selected the R29 per month over a period of 1 year. However within minutes my bank account was debited with R15+thousand. I have tried every possible way to contact this organisation to arrange a reversal of the debit but they cannot be contacted. I notice on their Face Book page that other people have experienced the same problem. That clients cannot contact them is highly unacceptable.