Grrrrrrrrr! (Amazon)

I'm really annoyed with Amazon at the moment!
I have just read a book, loved it, and bought the sequel - and it still hasn't arrived
They sent me an email to say it had been sent, but no sign of it yet, and it's been ages after I should have received it. Do you know what i mean, when you've read a book and you need to know what happens to the characters in the sequel/follow their adventures etc?

I've read all the interesting books at home and in the school library and I go mad if I've not got a book on the go - I've even resorted to my mum's "cosy village until a new female city doctor arrives, meets handsome landowner and hot ex boyfriend who she's forgotten why she split up with, can't choose between the two, but it doesn't matter because someone's just been murdered with knitting needles and it's the village show etc etc" romance books (see how desperate I am??).

Sorry, had to get that off my chest
Has anyone else had the same experience and ended up with no decent books to read and a growing dislike of Amazon (damn you, cheap books website!)?

And now you probably all think I've gone crazy.....

because it's not Amazon itself selling it, but one of their secondary sellers (i don't know what they're called), and it won't let me track it (I'm in the UK)
worth a try, eh?