I had a similar experience.

sold my house to a complete **** he wanted everything and complained about anything, kept me hanging on and then forced me out when I had nothing arranged, as it suited him. To55er.

anyway 5 months later he phoned me to ask for receipts to a new shower as part of a 10K bathroom refit I had done - needless to say I kept letting him leave messages until he gave up.
and also I sold at the height of property prices and downsized - so he has lost a bundle on what he paid me for it.

it is true "what goes around comes around".