Admin Panel Site

OC Version: 3.0.2.0
Theme: FastBuy Theme (Licensed) Bought from themeforest
Extension/Mods: -

Your query: I can't edit store settings, neither static info from admin panel it shows me this error.

Forbidden
You don't have permission to access /admin/index.php on this server.
Additionally, a 403 Forbidden error was encountered while trying to use an ErrorDocument to handle the request.

A link to your site: textile-mercerie.ro

You have asked in the wrong section of the forums, this is for version 1.5. It looks like your file and folder permissions on you hosting are are not set correctly. Usually folders should be 755 and files 644 or 600, but it can depend on your host.