It's hard to say what it is without looking at it personally, but...
Sounds like your wastegate actuator is keeping the wastegate opened. This would explain no spooling, why exhaust gas is only going through the wastegate, and air not being sucked into the intake. Though I'm guessing air is still being pulled through the turbo, just a very minimal amount.
I would adjust your wastegate actuator (loosen it, so turn it counter-clockwise) so the wastegate can close.
Also, I'm a little confused...
Was your car ever running? I mean, is this the first time firing it up or have you been driving it around and it has been slowly losing turbo spooling. Cause if the car was working previously, then I would say that the actuator may have not been "locked in" by the nut.
Hope this helps :/