18m Wanting Legal Advice On A Scam By 2 Us Individuals

Location: New Zealand

Wanting ANY advice on what to do/any other legal means I can take to get my goods/money. Thank you!!!

Backstory: I live in a toxic household and have been attempting to save up while at school to buy my first car and move out ASAP. I used my little money to start reselling designer clothing via Instagram, as a friend recommended it to me. I amassed a collection worth just over $9,000 in around 2-3 months of doing this.

I was contacted by a US based individual looking to "cash me out" on 11 items for an agreed upon amount of $7,950 NZD. Since I was a "newer" seller to the scene, he wanted to do the deal through a trusted middleman (also US based), a big name in the reselling community with 6k followers and HUNDREDS of past deals. A group-chat was created and the plan was for the items to be sent to the middleman for verification, to check they were as I described them, and then payment would be sent to me, and the goods would be sent to the buyer. This is a normal occurring thing in this community.

I shipped the items out (cost me nearly $300 in shipping), and was over the moon, as I would enough to buy my first car, with a little left over. However, around a day after I shipped them out, I was talking to a friend who warned me that these two individuals specifically were good friends and have used this same tactic to scam unknowing "newer" resellers in the past. I immediately confronted them both and was threatened by means of "swatting" and my girlfriend was also harassed via social media.

I tried getting my package back before it landed, to no avail. I then filed an FBI IC3 report and a 105 report to NZ police (to which they haven't responded for over a month and a half). I have countless screenshots from the group chat, as well as screenshots of the individuals literally listing my items for sale on their own pages. I have the shipping label of the middleman, which has his full name and address, I also have a link to a public official florida government website that DIRECTLY ties the middleman to his legal name and address, as well as Instagram reselling business.

TL;DR: I resell designer clothes on Instagram and was scammed by a cross-border trusted middleman and his friend out of $8,000 NZD worth of clothing

What can I do? Everybody in my country's subreddit said that if my local police were going to take action and liase with US authorities it would be for MUCH bigger sums than 8k, and nothing will become of this, regardless of my evidence.