blown turbo on ford focus TDCI 2003? 115ps 90,000?

Hi , my turbo blew on the motorway and as i pulled up the engine reved at full till i stalled it to stop it.
Iv had a new turbo fitted but there is still a major problem
The garage says it could be a bent valve or con rod due to the oil been forced in engine, but they need to investigate.
The car drives but wen pressing accellerator the engine vibrates and is slowish to pik up, but when u just hold pedal steady doing 2000 to 3000 revs the car feels fine and cruises along, its just when you press the pedal.
The garage cleaned the intercooler, inlet manifold twice.
When the car get warm u get a few drops of oil coming out of exhaust and a bit of smoke off this, so there is still oil in sytem.
My next plan is to remove intercooler and try and drain oil a bit more if theres any in.Iv also added some fuel system treetment.
Where is the EGR valve , iv been told i need to clean this ?
ANY IDEAS on what it could be, and does anybody think it could be the valve / conrod ?
Thanks in advance for reading