Hello,
Do you have the access to CPanel and Database? If so, please follow these steps:
1. Make the full backup of your site on the host, hope you have the account access, if you have not try to restore with them.
2. Enter your database and export Database.
3. Enter wp_users table edit admin and password, choose MD5 and save.
Be very very careful! Make the backups before doing anything, enter the changes accurately not to damage your site.
You can upload the theme from the ThemeForest account and get the purchase code. Let me know if you still need help.
Best Regards
.
