How do get my money back from scam website www.thehomeworker.org

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I want to do some online from home.so i paid to above website using HDFC netsfe card through plimus.But they want me to place ads on free classifieds.I did not like that.They promise me 30 day money back gurantee.BUT even I acannot contact them. Please tell me how do get my money back.whether I can reverse my credit card charge