I have spoken to my colleagues in England and it seems your motor is now 4 years old. The offer was made to you for a fair repair in terms of costs. But to come on here and state that Wren is unproffesional is dead wrong. We do not sell turbine wheels for our production turbines to the public. And to threaten the office to give you what you want or else you are "going on the internet" ...Shame on you.
At least now everyone knows the rest of the story.

To add a few more details. It seems to me that you are not willing to send the motor in to the Wren engineers for a look. You expect to be able to buy a turbine wheel to repair this damage yourself, but refuse to let the company that built the turbine even see it.

Sorry to rant, but this whole thing smells to high heaven!
And to come on here and publicly state that Wren is unprofessional?