Food left for Sitters

Oh my gosh! I had a sit where the whole fridge was rotting, and every sauce and fruit had mold. Things were at the back of the fridge that were forgotten and bought again… only to see it go moldy again. I do not understand… do they not check anything before a sitter comes? I try to understand different circumstances, who knows if the people suffer from mental health issues, etc.
I understand the rush and that you are extremely busy but this is just a health threat at this point.