how to unlink una.io account with una website?

Hello, what do you mean exactly, your license is just linked to a domain name, in the event that you leave UNA cloud for another host while keeping the same domain name, I think it should continue to work no problem. You can also switch your license to another domain name, everything is managed from this page

Ok, in this case, I believe that only the owner of the modules can do it, make the request by e-mail.