Been there!!!! My mom is a hairdresser and when I was a teenager I agreed to let her perm my hair at her work. She also cut it all off and my perm was SUPER tight. As soon as I saw it I bawled my eyes out right in front of everyone. She wasn't too happy that I did that.
It will grow back AND the curls WILL relax! If you still hate it you can go back to the salon again.
Hugs, we've all been there.
I even had my shoulder length hair cut super short by a friend. My ex saw it and took the clippers to my head and gave me a brush cut (well almost)!!! I wanted to wear a hat to work too! I settled on bandanas for a month and hair gel to "style" it.
God, it happens to us all. Doesn't mean it's any easier to deal with though!