Hi guys

I'm hosting a new client wich already had AbanteCart with other provider ... we just did a transfer account from cpanel to cpanel so everything (files, database etc) now are in my hosting

My client installed Abantecart from his Cpanel apps (with the old provider)

The Main URL of the Abantecart show maintenance page (We are currently performing some scheduled maintenance.
We will be back as soon as possible. Please check back soon.) .. when I tried to go to admin page I use
/admin
and
admin/index.php?s=admin

But i got this error:
Forbidden
You don't have permission to access  on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request

I tried to comment .htacces from admin folder and when I go again to admin page It just redirect me to the maintenance page

Is there anything I can do to fix this ?

I really I really would appreciate your help