Dell Inspiron 13 7000 cracked screen

I have owned my Dell Inspiron for almost a year. About 4 months ago, I woke up and noticed a crack across my screen. At first I thought that it might have been some of my housemates that accidentally stepped on it. However, as I was thinking about it recently, that scenario seems highly unlikely as I kept my laptop closed and close to my bed when I wasn't using it. I was careful with it and didn't damage it in any way I can think of. I've owned several other laptops and never had a problem with cracked screens before. I've only now gotten around to calling Dell and asking for my laptop to be repaired to which they've said that it is not covered under warranty and that I have to pay over AUD600 for a new screen and additional AUD130,140 for it to be installed! That is ridiculously overpriced! Not to mention, that as I've been reading some of the forum posts on this page, it seems that the cracked screen is a designer flaw and not my carelessness. 

Has this happened to some of you as well? What should I do?