[lostandconfused]

politeness costs nothing.

The person you so nicely talked to, isnt the person that put the details on the system, he simply picked up a job and went to try and help.

He could have turned up, not been able to help so gone and done one of the other jobs on his list, making you call back get a re-appointment etc.

Your right that he should have known what the problem is, and there should have been enough people to do the job properly. But the fact is it wasnt, speaking to him like that isnt going to make him get in touch with his supervisor and get something sorted, he is more likely just to mark it as failed and leave it, its no skin of his nose.