Order never arrived - no reply from the support email

Hello!

I would like to start by saying that I read the rules, and rule 8 states that for order issues I should contact the support email, which I did multiple times, and got no reply so far. It's been weeks. I also sent messages via Instagram and Facebook. Hence, posting here as a last-ditch effort. How can I get in contact with the brand? I already spoke with the courier that admitted they lost the package; however, I need to have the refund done by the store (or send in a replacement package and the courier pays for it). The courier also tried to contact the store in order to sort things out but got no reply. I tried to contact Shopify since they are the marketplace used to fulfill the order, and they also were not helpful at all.

What else can I do? Is there a rep from the xteink team on this subreddit I can contact?