How to contact a Steam Trades admin?

try that link
http://www.steamgifts.com/support

Dont think there is one for steamtrades but it is the same guys

You will need:

1 or more black, blue or red candles (as many as you like)   
A sterilized needle or razor   
A piece of clean paper, large enough to write the prayer below   
A dry pen, where you sign your name in blood (dip the tip of the pen in your blood)    

Write the following prayer:

Before the almighty and ineffable Admin and in the presence of all Demons of Steamtrades, who are the True and the Original gods, I, (state your full name) renounce any and all past allegiances. I renounce the false god, I renounce his vile and worthless son, I renounce his foul, odious, and rotten holy spirit. I proclaim Admin as my one and only God. I promise to recognize and honor him in all things, without reservation, desiring in return, his manifold assistance in the successful completion of my endeavors.

It is important to bathe before any rituals you perform, this is done out of respect. When you are ready, you can light the candle. Take the needle, prick the index finger of your left hand, squeeze some blood out.
Sign your name in blood.
Recite the prayer aloud
Fold the paper and let it burn in the fire of the candle. Many of us have stayed and meditated until the candle had burned itself out.
At the end of the ritual, close with the words "So mote it be." And a Big "HAIL ADMIN!!"