Dear Hamidullah,
We have double-checked everything but we didn’t find any issues that shows in your video in our installed script.
Please provide your cpanel and website admin (URL, Username & Password) access using our Envato Market (themeforest) profile contact form https://codecanyon.net/user/themelooks#contact (screenshot as reference http://prntscr.com/gkmr2r ) including this support topic link as a reference to review the issue to fix.
Moreover, the ‘buy now’ link is just an anchore link to provide a affiliate link for domain affiliation. That’s not a form that we integrated with WHMCS.
Best Regards,
ThemeLooks Support Team