I took my A6 in to be serviced at Nalley Audi in Roswell, spent over $1300, but then decided to upgrade my vehicle. I explained to the salesman that I was not going to "eat" these costs, so I was told I would receive a credit in the service department for the amount I spent. I was promised this over the phone the next day since the service department was closed when we signed the paperwork. I was told the car salesman would have to get back to me the next day, but that it shouldn't be a problem. I spoke with someone in the service department, and there is no credit for me there. I was told to contact the GM, Paula, but she will not return my calls.