All the details about the domain registrant in the WHOIS lookup is marked "GDPR Masked', meaning that the registrant has chosen not to share any information such as names or addresses. That is perfectly legal under the new EU privacy laws.
The UK address given for the company on its website is difficult to trace - the road that is given consists mainly of private houses.
The American address is a shop called 'Postal Annexe' which provides mailbox facilities.
Lots of the links on the website do not work, and some of the grammar in the text leaves much to be desired - hardly what you expect from a business that advertises itself by saying:- "Welcome to World's Leading Software,Information Technology Company" Note the absence of 'the' before 'World's'.
I have written to the email address they provide, informing them of your post, and asking if they would care to comment. Any serious business is going to respond pretty quickly to an email like that. Let's see what happens after the weekend.
Presumably you paid by credit card? If you did, you might want to consider contacting your card provider to tell them what has happened.
How long is it since you made the payment?