Yep an exchange is the way forward.... unless yours is too damaged - then you'll got charged a surcharge!
I've used
www.turboactive.com in the past, and was impressed with the service.
The turbo impeller will always have some play, that's how they work.... it's only when it gets excessive you need to worry - i.e. touching the sides!!
If the turbo has gone, be careful when you run it… as if the seals have gone it could start blowing oil straight into the inlet manifold – which means the engine will run on its own oil. And you then only have two ways of stopping the engine….
Firstly, run away and wait for it to go bang as it over revs.
Or, using something flat (not a rag as it will get shuck into the impeller) bung the intake to the turbo up, so no air can get in.
Best to run it with pipe from the turbo to the intercooler disconnected.
Although…..
Definitely sounds like you've got water in the oil.
Did the engine suddenly stall when you got stuck?? I.e. is there a chance the engine could have breathed in a bit of water and hydraulic’d??
As that would explain the lumpiness and the noise.
Have you used any coolant??
It might just be that you’ve blown the head gasket… in which case, not that hard to fix.
Ian