Dental student damaged my teeth?

I started going to the faculty of dentistry more than half year ago, originally because one of my molars broke {just a tiny piece} and I wanted a crown. Dental student took X-rays and found few cavities. Even though I wanted to have taken care of that broken tooth first, he kept saying he didn't have enough of time, or he didn't have this or that... few months later, another piece broke off that tooth and it now can't be crown and has to be extracted. I am upset, because I wanted to save that tooth and that is why I started going to the faculty, not because of few little cavities. If it wasn't enough, I visited licensed dentist last week and he said he's never seen such a bad dental work and that I will need to have about half of what the student did redone. He didn't keep the contact between filled teeth. I know this student is pretty bad, he failed dental license exam twice. What do I do, can I ask for at least some money back so I could have it done somewhere else? I feel like an idiot, I spent over $1000 for fixing my teeth and now I am going to spent even for to fix these fixings.....
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HELLO, DENTAL STUDENTS ARE JUST THAT-- STUDENTS. THEY ARE SUPERVISED BY A LICENSED PRACTICING DENTIST FOR ALL THEIR WORK. YOU HAVE TO COMPLAIN TO THE SCHOOL ABOUT THE POOR CARE YOU RECEIVED AND ASK TO GET SOME MONEY BACK. MENTION THAT YOU;LL CONTACT THE MEDIAL WITH THIS STORY IF YOU GET THE 'RUN AROUND'.
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