Hi, I hope I can assist you with your problem.
I can confirm that there is a software update available for running concerns on your vehicle.
If there are no fault codes stored in the engine management system, then this update should rectify your fault.
however, if there are any fault codes stored, then they should be investigated first.
In regards XXXXX XXXXX update needed to be done after the intercooler fitted, this is incorrect.
The pcm would need updating if a EGR valve was fitted, but definitely not an intercooler.
As you have already payed £650, i would make sure that they don't charge you anymore money for the update.
If you have any further questions, please ask.
If you are happy with the answer, please click accept.
Best wishes, Paul./