Feel like i got screwed over at work. Should i give them a piece of my mind?? And do you think their lying?

I'd be insulted that they sent an email to me and not called me. To me it sounds like after just one day of work they 'fired' you. I would think they didn't like the way I worked and couldn't face me so they made up some excuse thinking they could pass me off. Honestly, if I didn't get a phone call I would have ignored the email, still shown up to work and pretended like everything was normal. In the very least I would have called right away seeming concerned. Acting like I got some fraudulent email about how weeks worth of work suddenly disappeared and make a point of why I wasn't properly notified about such a change. Also if they had a resolution like this then why weren't you told in advance since now you're out of time to look for other work for the summer. I would push further for another available position since if you had know about their...other plans then you would have known to keep looking for a replacement job but now they've left you with nothing. If you did good work and they had no reason to terminate you then by all means call and get a straight answer from someone.