> we spent months going around Italy to get the best suppliers we could find (italian artisans mostly, which have 0 presence online and that were still interested in selling abroad)
Did you make similar "offline" effort on customer side like going around and talking to the potential customers? It seems you took "active hands-on" approach for supplier acquisition, but you are taking "passive hands-off" approach for customer acquisition.
While online promotion through advertising is good, I will suggest do some offline reach out to potential customers. Consider going around the places and events where people who like high fashion, handicraft, clothing hang out. You need to find a few early adopters who can be brand ambassdors. You need to be in close contact with some of your early potential customers so that you can see their decision making process, hear their comments, etc.
Time for some guerrilla marketing.
[1] If you can identify a few vendors, places, or events, offer to give them at cost all the sale of your line, display few pieces of your clothing with oversize tags on the clothing, banners directing to see more choices at your website.
[2] Ask a few people who mingle in such groups to wear your "attention grabbing" clothing that would potentially spur conversation among people.
[3] Show up at the gatherings of targeted people wearing your own clothing with a small tag hanging out, like you just bought a new piece of clothing and forgot to remove the tag before wearing and going out.
[4] Instead of buying gifts for any occasion to your friends and family, give out pieces from your clothing line as gifts.
[5] Take some of your low cost clothing to a few consignment stores who sell "high fashion clothing" and sell them as seconds. You will also gain insight into pricing.
[6] Hang out on online forums relevant to your line of clothing. Become a subject matter expert on such forums.