Thank you for contacting Steam Support.
Steam Support is unable to provide assistance for trades that were arranged outside of the Steam market. You will need to seek assistance from the third-party platform for any disputes you may have; we will not be able to provide any further assistance on the matter.
It is your responsibility to ensure you are receiving the correct items/gifts at the time of accepting the trade.
We will investigate this user and take appropriate action. Please note that you will not receive a notification about any action taken as a result of this report.