I Locked My Sister In Her Room, My Parents Punished Me By Locking Me In My Room As Punishment Is This Fair , Did I Deserve It ?

last thursday i had a row with my sister, because she is claustrophobic and HATES confined spaces i locked her in her room, i must admit i enjoyed watching her kick and scream to be let out, anyway my friend rang and i got distracted, went out and forgot about my sister, my mum found her 6 hours later , she had 2 or 3 panic attcks, missed her driving lesson and a date with her boyfriend, she even had to wee in a flower pot, my parents went made and said i was going to get a taste of my own medicine, when i got home from school on friday evening i was escorted to my room and LOCKED IN my parents said i would remain in my room for the entire weekend this was to be my punishment, i lost my phone , pc and tv, i had to eat in my room and was only allowed out for bathroom breaks. as i have exams this year i was set school work to do including maths, english , french ,biology, and science, i also had to write two 4 page essays, one on UNACEPTABLE BEHAVOUR AND PUNISHMENTS and another on WHY ITS WRONG TO LOCK MY SISTER IN HER ROOM i found it a tough punishment , did i deserve it or was it too harsh please be honest ?