Nokia :: 5800 - Dead Pixel On Screen

I recently bought a 5800 and it has a dead pixel on the screen. I was really looking forward to getting this phone and I am now quite disappointed (and disgusted by the service I was offered here in Malta!). I returned it to the shop where I bought it and was told that I have to have at least 5 dead pixels for me to be able to change it. Is this true?

It is still under guarantee as it hasn't even been a month since the date of purchase. They tried to feed me so much bull (including: the laws do not apply for Malta and that i had to go back within the first seven days EVEN THOUGH it clearly says on the guarantee that I have a 30-day period from the date of purchase to take it back).