If you want a refund you can always talk with your credit card company and tell them to perform a "chargeback" for the transaction done for this game. Reason: "Service not provided". Because these scammers are just playing fool everyone.

Before you do so, tell support of steam you are going to do a chargeback. If they don't give you a positive answer, don't argue. Go to your credit card company and your money will be back to your credit card.

We live in 2017 and scamers who are defended by companies that support sellers not buyers such as Steam can't just fraud people. You are allowed to ask for a refund to your Mastercard/VISA/Amex up to 3 years after the transaction was performed.