Here you go... you are simply an other victim of this dirty and badly regulated (if at all) new prop dev market in which people are desperate to buy.the 3A (anything, anycost, anywhere)
A friend of mine went to see a new property last week, (i think he put a deposit).. this week he talked to the EA who said that the price is now €20k extra b'cos of demand!!!
I do not understand why EA are so reluctant at giving detailed plans... Detailed plans do exist otherwise how would developper get PP, and how builders would build. These plan can be viewed by anybody at the city council. It is just a matter of taking the time to go there (may be make appoinemnt before). Anyway, this will not give you any guarantee that there will not be any changes.. check the small print.
I do not think there is anything you can do. You take it or you leave it.....
But do not feel trap... you do not have to buy this one... there is plenty more on the market.
Not all property sell off the plans... there are remaining ones after everything has been built. So, yo can see and measure what you buy...
Have you considered second hand market? at least you know exactly what you are buying....