Volkswagen Customer Care - POOR SERVICE

I have been driving Volkswagen all my life. With my Tiguan, that is still under full warranty and maintenance plan, I had 3 problems already and every single time I had issues with Volkswagen. I am sitting without a vehicle at the moment and logged a case for a courtesy car as the dealership does not have one available. The dealership said we must contact Volkswagen Customer Care for help with a courtesy car. I logged a case with Mariam on Monday morning. She said the turn around time is 24-48 hours. We just got confirmation that we will not receive a courtesy car. I phoned Mariam yesterday afternoon 7 times, and every single time they had an excuse why she is not available. Left messages to phone me back. Still no response. Had to phone her again today and another excuse - TEA TIME !! I asked them to ask her to phone me back after tea time. No response. I had to phone again and she said she will not speak to me because my husband logged the case. She was so rude. Asked the managers who are working from home to phone me, still waiting for them to phone - after asking 4 times already !!! Guess they will not respond as per previous cases.