Personally, if they fit well, I'd keep them. Fit is the most important thing.
I don't know anything you can't search for yourself on the Internet. But I just looked
Edia's roller skating pages mention a warrantee without being specific:
http://roller.edeaskates.com/en/tech-info/frame-assembly/traditional-frame-mounting/You refer to the U.S. distributor as "she". Last I knew, the main U.S. distributor is Skates U.S., run by David Rippon [sp?], a "he". Though maybe a "she" answers the phone.
Their contact info, from the Edea web site, is:
SKATES US, Inc
415 West Eaton Pike, Richmond, Indiana 47374, USA
+1 765 935 7477
I'm tempted to suggest you call the factory - except it is in Italy, so I don't know if you would get someone who spoke English.
Other English language contacts, according to
Their dealership list are a Canadian dealer
Jerry s Skating World Inc.
265 Hood Road #4, Markham, Ontario L3R 4N3, Canada
+1 905 477 1172
www.jerryskate.comand a couple Australian dealers.