Hello. My name is Michael. I can help you with your question. This is something that has to be handled directly with the company that sold you the credits. Do you know how that is? For example, Zynga, Facebook, etc. If so, then you can go to their site, select support, and then ask them fro the credit. But if you aren't sure, let me know, along with whatever information you do know about the site and I will try to help you from there.