Call your bank or card holder and tell them what happened. They will investigate for fraud and hopefully refund your money. Then, you can also report to the FTC and file a complaint online regarding scam practices.
I sick of these scam calls so I've decided to give it right back to them. I'm having their number forwarded to another scammer so when they call 2 scammers will be trying to scam each other HA HA, see how they like it!!! That way I don't have to take up another slot on my block call list. I bet they will stop calling me after a while. I'm doing this with all scam calls I get I have had it with these people.