I parked away from the carwash, entered the store, queued and purchased a carwash ticket just like one should, and then entered my car and drove towards the carwash. There was one other person in front of me when a jeep entered the forecourt and drove ahead of us and stopped at the entrance. A man got out and walked towards the store to buy a ticket. I took issue with this and explained that we already had tickets. You buy first then queue at the carwash. He didn't care and continued to the store to buy his ticket, leaving his jeep blocking the entrance. So I drove to the front of the carwash and reversed in as it was clear. I then scanned my ticket and proceeded to use the carwash I'd paid for. He wasn't happy but could do nothing and I felt great for teaching him a lesson.