Steam Key failing

Im using Steam since 2000 .. Never bought a game , and can´t play them..

Steam is accepting my key ; u want money again..???
It feels like a Scam

I´m realy Bored..After 5 Hours inkl. Downloadtime + 30Euro + Supportemail.. I´m Still not able to Play..

How many Money and Time , i have to spend , for playing this Game first Time ?

Just Fix This Crap .