Dear Hamza,
Maybe you missed something when setting up a Variable Product. Please check out the Woocommerce Documentation about How to set up a Variable Product https://docs.woocommerce.com/document/variable-product/
If you did everything the same as shown in the Woocommerce Documentation then please provide your wp-admin (URL, Username & Password) access using our Envato Market (themeforest) profile contact form https://themeforest.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, please create your own topic without posting a reply to someone else created posts. Because the post creator can feel bothered for getting unexpected notifications of every reply of his/her created post.
Best Regards,
ThemeLooks Support Team