The Website is Removed, but still my theme is active (how to deactivate the theme)

Hi, i have bought a theme for my site, unfortunately, the site has been deleted due to non-payment, and now I need to deactivate this theme.

how to do this and is this possible,

Although you need to purchase a new copy for the new domain, some authors may offer a domain change. You need to contact the item author if their policy is okay to switch the license - if not, you may need to get a new copy.