In uCoz system the cleanings of inactive ("dead") sites are constantly running. A site is considered to be dead if no one visits it for 40 days. If you use .html files as your site, the visitors on the site are not taken into account and such sites are also removed in 40 days. According to the system rules you should use at least 1 content module (blog, news, catalogs, forum, guestbook etc.). If you need a simple static site constructed of html pages, uCoz is not what you need.
The system does not remove the sites at once, it marks them for removal (thus they do not work); the site has this status for the next 15 days and during this period registration of a site with the same address is impossible. While the site is being marked for removal, it is still possible to restore it. However we can restore only a site that contains sufficient amount of entries, we do not restore empty sites!
We do not carry any responsibility for your unwillingness to observe the elementary rules of our system.
check your e-mail. There should be notification about inactive website..
contact tech support (CP - help - technical support)