erm, going by your last post, you applied on Thursday the 27th, yes?
Are you actually complaining because you haven't had anything apart from the acknowledgement by Sunday 30th?
Is this a Generation Y thing, or something?
Back when I joined, I applied in the August of 19xx, received an invite in November for an interview in January of the following year. I then waited two years for a start date.
BA are currently processing 3 recruitment campaigns, plus other departments such as customer service. It may take more than one day for you to get an invite or a rejection.