Tradeit.gg has scammed me

Scammer's profile link: N/A (Website: https://tradeit.gg/)
Amount scammed: $405 USDT (Tether)
Discord ID + Unique Discord ID: N/A
Proof that it's their Discord: N/A
Explanation of the trade: I wanted to up my balance on their site to buy some more skins for the games I play. Sadly because of my mistake or because of the site's bug the website didn't recognise my payment, so it has to be verified mainly. I've been waiting a month now, and currently the website is down.
How they scammed: My balance didn't get updated.
Other relevant trade screenshots: In private post below.

I'm still in doubts whether this is one of those scams where they keep stalling me, or if it's just extremely poor business practises where you have to wait over a month for your order to be handled. Either way it's concerning.