I don’t always do this, but the Consumer Protection Bureau in the Economy Ministry in Lebanon does a pretty decent job.
I’ve had the unfortunate chance on several occasions to deal with them, and so have several close friends.
On one occasion, my friend bought a gold bracelet for his girlfriend. A week later, the bracelet got discolored, making it obvious it’s a knock-off. My friend reported it, and a week later, the fancy place in downtown Beirut issued him a check with the full amount he paid including taxes.
In my case, a promoter had lied about the act he was bringing in from abroad. The next day, he was interrogated by the police and all the ticket-holders were reimbursed.