I got on really well with all the guys that came, spent time chatting about the industry etc, whether they like me or not is irrelevant as far as I'm concerned,
I don't want to marry them or bare their children, I just want a heating system installed, I understand you don't like where this is going but the sad fact is that because of the nature of the business, I e one off installs people get away with this sort of behaviour.
I know I will be kicked off this forum because I have highlighted and unpleasant subject but to be honest I don't care, I have to tell it like it is.
Anyway your not alone, I'm on another plumbing Forum who have the same issues.