My amazon package is going to be late?!?!?

So I ordered about I don't know 6 things off amazon and it was basically a nintendo 3ds with just some a games a new pair of headphones and some other stuff. So all of my headphones broke and I really needed knew ones which is one of the reasons I'm mad but so anyways here's the point. I ordered stuff off amazon 3 days ago and I got an e-mail today saying stupid junk like it's not in stock when I triple a million checked everything and they all said they were in stock so I'm really mad. They are cheap liars! Anyways so I leave for a trip on July 7th and they said it would get here on July 6th!!!!!!!!! AND THAT WAS JUST ESTIMATED TIME!!!! UGH!!!! And THEN they said only the GAME which is USELESS until I get everything else made it through. ARE YOU KIDDING?!?!? So I just need advice on what I should do should I call them or idk email them? I'm freaking out and I need to know what I should do!