1. Negotiate with the merchant: First, try to negotiate with the merchant, explain your own situation and ask the merchant to refund the money. If the merchant is willing to return the goods, you can accept it.

2. Complain to the Consumers Association: If negotiation with the merchants fails, you can complain to the Consumers Association and ask the merchants to refund the money. Consumers association helps you safeguard your rights and interests.

3. Call the police: If you think your rights and interests have been infringed, you can call the police and ask the police to help you solve the problem.

4. Seek legal help: If you need legal help, you can seek the help of a lawyer to help you solve the problem.

In short, if you are cheated when buying Goya Jewelry 2000 vouchers, you should take timely measures to protect your rights and interests.