God knows if you believe it or not. It is possible that the seller really does activities and plays for free. It is possible that the seller never thought about giving it to anyone for free. This is really free only if you receive the full amount and return it. If you can't return it, it's fake.
He went back on his word and didn't give you a free ticket, so you couldn't help it. Moreover, the seller's full refund of the transaction is a false transaction and may be fined for free. Sellers should not be so generous.