****** property by air attendants

My sister was on flight FA 201 , she was the last passenger on the plane, she left the plane but suddenly remembered that she forgot her iPad in the seat holder. When she reported that she had forgotten the iPad she was told it was not there. There was no one else in the seat and there had been no other passengers on board the plane. This leaves the flight attendees whom were on the plane at the time with her. This is disgusting that passengers have to be treated this way but this airplane. It will be last time we make use of fly safair !! The treatment she got from the airline is disgusting, how can something that was forgotten by some one be missing if there was no one else? It’s absolutely disappointing and disgusting that the airpline *****s from their passengers!!