I've only lost one "unhappy" customer. She was a Mar - Nov person cause "there's no point doing them in the winter!!" as she said . So In March I put a note through the door saying i'll be round next week. She was away but her mum was looking after the house and phoned me and said can i leave it this month and do it next month. Yes off course i said no problem, always be polite. I went and did them next month. The daugther phoned me saying " I didn't ask you to do them" I replied no but your mum did!! She moaned a bit ( her house is worth about £340,000 and she's bickering about £15.00, SAD) so i din't retaliate i just wrote her a very professional typed letter pointing out that I am a legitimate, honest window cleaner ( hence the original call to say I was coming round) and that she was incorrectly questioning my integrity....So...i finished the letter by saying... Thank you for your business.....keep your £15.00...... but i'm not coming back. I must point out I still have 13 other very happy customers in the same Close paying me between £15 and £20 each per month. It's her loss, not mine....