My uncles kindly booked a table for 12 for my moth...

My uncles kindly booked a table for 12 for my mother's 80th birthday party. The restaurant told them that because we were 'so many' they needed us to choose off a set menu and to let them know in advance. My uncles duly got all the guests to choose and then confirmed to the restaurant all of our choices. The next thing we hear is that they have decided to change the menu and they wanted us to choose all over again. My poor uncle, who is my mothers older brother who is no spring chicken himself finds that he has to repeat what we already thought was a pretty dictatorial exercise. 12 people for lunch midweek should surely be something a restaurant can cope with without having to resort to a brief set menu (2-3 choices only). It seems to me that this is a place where the client is not considered all that important. I am embarrassed on behalf of my elderly uncles who only wanted to treat their sister and who now find themselves in an administrative nightmare.

UPDATE

The manager sorted out the chef and the menus were as originally planned. The food was delicious and the ambience and location are great. We did have to wait 30 minutes after we were sat at our table (1pm) for a waiter to come up and say the food would be with us in 15 minutes or would we prefer to wait a bit longer! We all felt that a 45 minute wait for food was quite a long time already, especially as we'd been asked to pre-order! Other than that it was a great place for a celebration and they are obviously aware that the seating is very low to the table as they arrived unprompted after we'd sat down with extra cushions which were offered around!