On most free hosting, including this hosting service, if any IP access your site too often that IP will be banned or blocked for 24 hours.Stop access your site for 24 hours, then your IP will be unbanned automatically.
On some hosting like 000webhost, there are a total connection for one day is 2000 times in 24 hours. Each click might generate several connections depends on how your site is coded.
If you have 80 HTTP request per hit then you will hit 2000 connections limit in 25 hits on your site per IP.
If you can access your site using proxy service than your IP is banned.
This hosting service has a higher connections limit and depends on which plan you sign up.