I purchased 5 lower longside (near the pitch/playing field) tickets to an English premier league game five months in advance. The tickets were delivered about 23 hours before the game. They were completely different - upper seats behind the goal. I complained and was told that these seats (and included access to hospitality suite) were better than the ones I originally purchased.
At the time of purchase the tickets I chose were more expensive than the ones I received. Between the time I purchased and received the tickets, the Liverpool manager had announced his departure and the price of tickets skyrocketed. I did not get the seats I paid for.