Does he agree he has your goods (and does he agree what the list of goods is). Does he agree he promised you a certain amount ? Ask him. If he does agree, ask for your money or goods. If he refuses/makes further excuses say you'll proceed now through small claims court. Be polite. But make sure you have someone with you who is not related / your partner, to 'witness', they don't need to be stood beside you, they could have happened to stroll-up previously and be browsing at the time you approach the shopkeeper... Personally I would record it, given the circumstances, but that's probably not recommended by most. I've used recorded phone calls in court to counter lies, even though I had no permission to record from the opponent. Nothing quite like the recording demonstrating the complete opposite of what the liar is saying, very humbling for the liar - the arrogance suddenly diminishes and the court's patience with them starts to wane.