no courtesy vehicle

On the 5 March I took my car to Audi for routine repair, Friday 6 March I was inform that the part are on backorder but a replacement can be source from their Capetown branch. Today Monday 9 March after complaints I was informed that the part will only arrived 17 March at the branch, I was also inform that because my car are out of warranty I don't get the luxury of a courtesy vehicle,therefore I am suffering the consequences of servicing my car at Audi Bruma and my car are out of warranty,I am a paying customer that feel ill treated by such a big company