There's no postal address. There's no phone number. There's not even an email address (just a web form). So (if they ignore the web form) how do you contact the vendor?
The domain name appears to be registered to a private individual (rather than a company), using an AOL email address (rather than one linked to the domain name).
http://www.whois.net/whois/jacken4moncler.com
The address of the registrant is a residential property, not a shop or a warehouse. (Checked with Google Earth).
I certainly wouldn't trust that website.
Chris