milkshakes always not available!

My children and I qued for 30 minutes on drive thru waiting to place an order. i mean really i didn't want to go inside to order for drivetrought suppose to be faster! not at Florida branch.The next thing we were told that the milkshakes is still not available. I mean we spent our time hoping that we will get what we want. Im very much disappointed and i think that i wasted that my time for absolutely nothing. The Mcdonald's branch is so useless.