"Room small"

"I booked this month's in advance. We arrived at 6:00pm and they had canceled our reservation because they'd tried to run the card i had used to reserve the room and it had expired in the months since I'd booked. They didn't call or anything. I've used Expedia for years and I've never had a hotel so this. I had booked a room with a king bed. They rebooted me, after we arrived, with a room with 2 doubles. I think they had just wanted to give away our reserved king room. Very poor staffing."