Me: Window cleaner calling tomorrow!
Customer: Sorry but you're too soon, it should be every 6 weeks.
Me: I gave you a written quotation with 4 weekly service upon it, I've been cleaning your windows and you have been paying by GoCardless every 4 weeks for the last 12 months and I've been running a 4 weekly rota for the last decade. I'm right on time. Thanks ( A bit abrupt I know but it really hacks me off when people tell me my own business).
Customer: Oh forget it...I'll do my own from now on!!!
Me: No problem.
You can see these things coming, the last 3 times he never bothered to say hello, except for the last time when all he said was "Don't do the door-it leaks" and shut the window. It's obvious he'd just changed his mind about the 4 weekly service but why can't people be upfront instead of playing these childish and transparent games?