Please delete all tables from database, and run script again it will re generate the tables and run installation from begining. Also check in users >> table if there user's row registered. If your script ran and create the tables, that should also created user row for you to login.
1) Please delete all tables in row and run script again.
2) You can also create new database and update information in file includes/db_connect.php
3) Once you install make sure to add user information for user and verify in database, if user table have admin user row.
4) Please turn on your website's notices, warnings and errors and send me the error you are receiving so i can suggest you the solution.
You don't need SQL file script creating tables nicely. Just send me the error you are receiving so i can help you further. Also please understand refund cannot be given for installation issue cause there is no issue, and we are also available to provide you help but you are not sharing logins. You can create FTP for only folder which holds the script and database.
Thanks. Try this and let me know what you get further.