disappeared

Someone requested for a domain here, submitted mine and it was chosen, he asked for my payment details and i gave him, payment was made since 17th may and I requested for his dynadot details immediately I confirmed payment, so I can push his domain to him but he hasn't been replying. How can...

Someone requested for a domain here, submitted mine and it was chosen, he asked for my payment details and i gave him, payment was made since 17th may and I requested for his dynadot details immediately I confirmed payment, so I can push his domain to him but he hasn't been replying. How can...