After service Turbo is no longer working

I took a car for service at acd service centre roodepoort , upon taking my car after service , Turbo of the car no longer kick in, now car is slow, went back to the place they told me its a problem with Turbo engines, I ask one of the workers at the place, He knew exactly what happened but afraid of the ower will hit him, thinking of talking your car there ...?/???