I think there is nothing we can do if we got scammed for that purpose here some hero members are providing escrow services better we use it to not be scammed again.
Yes, there is something you can do. I don't understand why people think the irreversibility of Bitcoin is a plus. The thing you can do is start making purchases using a credit card or debit card or payment service like Amazon Payments. All of those have fraud protection.
Reading about what Satoshi had in mind for bitcoin would support that. He says that a lot of transactions dont need the trust of a standard payment system like credit cards and we could use something different for that. So if you realy trust the one you are sending your money to you could use bitcoin. Or if the price of something is so low that you dont care you just use bitcoin.