Rog,
I know my what my biggest and best account is. The manager of the place can sometimes be stroppy with me, but to be fair, he's suffered from cancer and just had his right leg amputated.
So I just act cold and professional towards him. I answer his questions.
('Have you finished already', 'Did you do the kitchen area', etc. Yes to all).
However, if they messed me about I'd still drop it.
I suffer the weather, the rain, the shit up my ladders or round my hose so I don't have to put up with little Hitlers like this.
Drop 'em.