Avaaz took my money without my approval

An amount of R4,000 was deducted from my credit card on 20 June 2015 without my approval. I opened one of their mails on 17 June 2015, read the contents and closed it again. A few minutes later I received an e-mail thanking me for my donation. I almost had a heart attack!! I immediately replied on the mail that I did not authorise the amount and it must be a mistake. I also received an sms from ABSA Fraud Division to ask whether the amount was authorised, I phoned back and indicated that it was not authorised. I also send e-mails to ABSA and Avaaz indicating that the amount was not authorised and that the transaction had to be reversed. The only reply I received from Avaaz was automated and indicated that they were on a retreat and would get back to me. Even though I reported the unauthorised deduction the amount was deducted from my credit card on 20 June 2015, I am very disappointed in my credit card service provider, ABSA Bank and [URL Removed] I want my money back!!