you wont be able to please everyone, it down to what lengths you go to trying to please everyone,
i recently gave up 100 customers, I knocked on every door, spoke to everyone who was in, and left a letter for everyone that wasnt, i found them a replacement window cleaner and once again knocked on all the doors to introduce him, but the new guy didnt stick at it, but still some of those ex customers ignore me in the street, point is i tried my best to do right by everyone, but i would have been aswell not to have bothered.