Any one else think this is messed up?

okay so i asked my dad if he could drive me over to a local martial arts (Judo) dojo to try it out. he said it was fine and i went to the class. i only went as a tryout to see if i liked judo but the dojo did not really sit with me well. when i got out of the class i decided that i wanted to learn at a different place but when i gout out i found out my dad signed a contract for me to go there for ten months. i told my dad that i might not want to go the dojo beforehand but he just signed me up anyway. now i have to go to the class or i get grounded because according to the contract no matter what whether i go or not they take 100 dollars out and my dad says he doesn't want to waste that money. i am not being picky on dojos here it is just that the teachers paid little attention to the students and i could tell it was a mcdojo. also my dad says that contracts are pretty common for dojos and i was wondering if other people who had to sign contracts could get out of them. i am just wondering because if someone else could get out of theirs there might be a chance i can get out mine.