Many buyer send me message say my work good, and asked me can I done the work. When I reply him than there are no reply.
your profile picture both of different
It may be because your English is not good and buyers worry they will not be able to communicate with you. I know sellers on the forum who have difficulty speaking English say they study on Youtube to improve their English, maybe that will help you.
Possibly that buyer do not need that project anymore or choose another seller for any reason or got busy for something. Look for new client with new project.