I have a very bad experience with this "official" ...

I have a very bad experience with this "official" audi service ...
1.5 weeks ago I left my car there to perform air conditioning maintenance. It has been done but they have not checked whether it actually works.
No. 2 .. I leave my car to do a summer check.
After 1.5 weeks so yesterday I get a message on my dashboard that I have to top up engine oil tsss that is not possible .. 200 paid and yet nothing made ..
Fortunately, this does not happen on the way abroad ...
Totally bad experience