Frustrating moment

I got in the car full of excitement and my mom drove me to school. I couldnt wait to see my schedule. When I finally got it, I found out out they messed it up. They gave me Human Physiology instead of Spanish 3. I was so really frustrated because when I went to the office to talk to my councilor, the office ladies wouldnt let me, and instead they kept telling me to fill out a form, which I had already done. After about 3 weeks of school I finally got a reply for the form, which said, sorry spanish 3 is full. I was really mad because I passed Spanish 2 last year and I didnt get spanish 3 this year. What made me even more frustrated was that a bunch of sophomores got spanish 3 and I didnt! Shouldn't juniors get priority?