Horrible position to be in but spare a thought for my experience last year. Lady , in 30s, puts off appointment twice the night before 8am starts. Get to 3rd arranged appointment 10 mins early and wait. Knock at 8am but no answer. Ring the landline, in case in bathroom, then call mobile and leave message. No reply by lunchtime so i send in invoice for wasted callout, as per my terms & conditions. I get a call from her mother 4 days later to say that she apparently suffered a heart attack around 6am on the day of the job. Cancellations were for hospital trips prior to attack................invoice cancelled and I felt even worse when mother rang to let me know job was cancelled completely as her daughter died in hospital after 8 days.