[2022] Trade cancelled and skins disappeared

This is all handled by Steam so nobody here would be able to do anything. You'll need to contact Steam support instead. However, this sounds like you may have gotten scammed - perhaps the trade wasn't actually canceled?

Check your trade history: https://steamcommunity.com/profiles/76561199075293766/tradehistory/

And check your inventory history: https://steamcommunity.com/profiles/76561199075293766/inventoryhistory/