HELP, can't access to phpadmin

I have been trying to restore my database but I couldn’t access to phpmyadmin

Does the server not respond, or is it not taking your username or password?

You can always do it via command line if you have the file. If the file’s not in your account, you’ll have to upload it first via FTP.

Use the mysql command in the wiki article taking input from the .sql file:
mysql … < file.sql