Suddenly I can’t get any message and order from new buyers. But why ?
Because fiverr is rotating gigs.
Please keep updates in the same thread. It’s against the Community Standards & Forum Rules - 2020 to create duplicate threads. In the case of changes in a situation, it’s doubly important, so that people can see what advice you’ve already been given and/or what steps you’ve already taken.
As for your question, the short answer is: competition.