I had a pretty difficult issue but...
I had a terrible situation with the platform resulting in my account loosing 345$ for a counter-strike sticker (Flipside tactics holo). After raising a ticket to support and their investigation it turned out that the platform did actually their job correctly and it was the other platform mistake (i did buy same item on two platform simultaneously resulting in both platform thinking deal was done correctly). Previously I posted 1-star review thinking they just don't want to admit a bug and fix their platform, so I was wrong, their support is helpful.