BAD SERVICE.....ROTTEN ATTITUDE

I have guests who rented a car from Avis Hoedspruit Eastgate Airport, they were given a wrong car to start with and the disk had expired December 2019, when we called from our reception to help guests try to resolve the issue since well guests cannot speak fluent English, a gentleman by the name of Nicholas gave an attitude that he has no business with the lodge that the guests are staying in, guests must call him direct because its got nothing to do with us as a lodge....MY QUESTION IS, WAS I WRONG TO ASSIST THIS CLIENT CALL AVIS FOR HELP, SINCE WELL THE FAULT WAS WITH AVIS FOR GIVING THEM A CAR THAT THE DISK HAS EXPIRED. THIS IS NOT THE FIRST TIME THINGS LIKE THIS HAPPEN WITH AVIS.....BAD SERVICE