No courtesy car, new Audi, factory fault

I was driving from work when I noticed a coolant sign showing, I drove to the nearest Audi branch, but when I arrive they were closing. I was advised to fill water. The next morning before driving I checked the car and that coolant was way below the minim as if it was licking. I immediately contacted road assist who towed the car to the nearest Audi. When I get to them they couldn't't offer a courtesy car, was told there are 12 people before me also waiting for cars. I explained my case that my job requires me to have a car, and was told Audi do not guarantee mobility. That surprised me because this car is new only 38klm it should be having this problems and it wasn't my fault that the coolant was not functional. Because of not having a car I have lost a client that i couldn't attend a meeting time, my daughter is in hospital she was hit by a car trying to get a taxi, she is very young and not used to public transport. At this stage it difficult to do my job and to get to hospital to my daughter. when I bought an Audi I honestly thought it a reliable brand. I am ver disappointed