I wrote to VWGI in liffey valley.
This is the reponse I got, and I also CC'd the Head of Aftersales on the mail.;
Dear Mr. Reville,
Thank you for your response.
Unfortunately, as this issue is solely in relation to Joe Duffy workmanship, Volkswagen Ireland would not be able to assist you.
If you are unhappy with the resolution Joe Duffy are offering, we would recommend discussing your concerns with SIMI.
They would be able to assist you further in this matter.
Clearly they have no regard for their customers.