I bought a loaf of bread at Friendship market (near Tucom) for 60 baht, brought it home and took off the wrapper (threw it away) and started taking the bread apart to put in the freezer. It was mouldy. So I put it in a plastic baggie and took it back to the store 2 days later.
The clerk took it and went to see the manager. She came back and said sorry, can do nothing.
Weird I thought but did not make a scene just left the store thinking, what kind of decision making is that? Take a chance on losing a customer for the 40 baht they paid for it. Not a big deal of course but this is just another example of poor logic and lack of common sense.