Poor service from Vincent at Avis OR Tambo

I needed to urgently get 4 x sim cards to my family landing at OR Tambo today and the flight was delayed. I went to Avis OR Tambo and asked for the Manager. Vincent introduced himself and I requested if he could please possibly help as my family had booked a Avis rental and asked him if he could please place the sim cards in the rental envelope which normally has the bay number and vehicle key in it. Later when I treid calling my family I could not get hold of them. I eventually called the other family and they confirmed that they were there and no sim cards in the envelope. I have tried all numbers on internet for Avis OR Tambo just to be on hold for 10 minutes and then call cut. So well done Avis and Vincent you cannot even go the little extra mile and place 4 sim cards in a envelope that is in your tray with our families name on.