We are sure that you are already aware that Valve, starting from July 15, has introduced new rules for skin trading in CS2. These rules allow players to cancel any transaction that was made within the last seven days. The updates and rules apply exclusively to direct trades between users, which Valve classifies as Trading (meaning - exchange). To cancel such a trade, the user must go to the trade history and activate the corresponding option.

All items that were bought or sold directly through the marketplace cannot be canceled! This new feature does not apply here anymore! Now you are aware, and hopefully, things became clearer in your mind. Share with us whether you knew about this.