Pathetic service from Audi SA

I have owned 21 Audi's over the past 15 years. To date my Audi A8 required a pipe to repair the AD BLUE function. I had to pay R21000 rand upfront to order the part as it was being shipped from Germany. The dealer advised that the ETA would be week of the 6th January. Unfortunately no part had arrived and after engaging with the after sales national parts manager for Audi I was advised to request the dealer to request a rental from the factory until the said part arrives. The dealer makes the request and the factory declined the application ( on what basis, I don't know). I am not only disappointed with Audi SA but realize that my business over the past 15 years have no bearing on the decision making Process by Audi. Well you have lost me as a customer.