i locked my badly clustrophobioc sister in her room for a laugh, now its my turn to be locked up and punished is this fair ?

Last thursday i had a row with my older sister, because she is claustrophobic and hates confined spaces , i locked her in her room, i enjoyed watching her kick and screaming to be let out,i even recorded it on my phone , i only meant for her to be locked in for an hour or 2, while anyway my friend rang up and i got distracted and went out, i forgot about my sister, my parents came home 6 hours later and found her locked in, she had missed her driving lesson and a date with her boyfriend,she even had to wee in a flower pot, my parents went mad and said i would be getting a taste of my own medicine , they said i will be spending ALL of this weekend locked in my room as a punishment,as i have exams this year my parents have set me tons of school work to do , including maths , english , french and science plus two 4 page punishment essays per day, my parents made me get up at 7am, and in bed at 9pm for lights out, i will have to eat in my room and will only be allowed out for bathroom breaks, it going to be a , long and VERY dull punishment, do i deserve it ?