I started an order and worked for someone 34 days ago. He said that he needs to add some texts for his current design. (He gave me the design as an image and he needs to add the texts only). After that, I sent the whole files to him including the source files as promised. Now he is saying he could make this within 5 minutes and do a refund. So now, he has the source files, as well as if I do a refund, he has the money too. After that I said, I’ll redesign it. But I could not see him online for since 3weeks. If I canceled the order using "buyer is not responding" option, will I lose my completion rate? What should I do now? Please, anybody, help me with this.