My experiences were similar, although it was with my inferior TT RS
. After I bought the TT RS I tried to buy a service contract, was told I would get a call back multiple times and after chasing 3 times I gave up. Tried going in multiple times to sort a few niggling issues out whilst under warranty and constantly had to chase them. Tried getting 4 new tyres from them and the same issue, constantly chased them and in the end I bought elsewhere. I tried to get my warranty extended through them, called them up, gave my details (make, model, registration) and got told I would get a call back. Had to chase multiple times to get the call back only to be greeted by someone claiming they do the warranty and they were asking for all my details again but claimed they had a price. Turns out they didn't know my car was the RS model and the warranty they were trying to sell me was the dealership warranty. The dealership warranty didn't cover the RS models. After wasting my time he advised I should just do it via the Audi website. My black tailpipes had started to go after 2 years of ownership, the car was just over 3 years old and although they weren't in bad condition they were no longer as easy to bring back up to a good standard, I bought a new set and within 2 months they were peeling. I popped in to get a warranty claim logged and got told that it's something I wash my car with (it's all PH neutral, nothing else affected and my ceramic coating is still going strong), they then said I didn't clean them often enough and that's what caused the issue, they then changed their tune and said you have to clean them with Audi's special cleaning product. I was promised a call back twice and didn't get one. Whilst all this was happening I enquired about buying a RS4, they were more interested in selling me a S4 that was in stock and thought I was weird for not wanting it.
Maybe I was expecting too much from the brand but it's left me with a sour taste in my mouth.