What can i do if i was sent to remand and then i was found innocent?

I am 15 years old and i was arrested on suspicion of murder. After being sent to remand 36 hours after being arrested i appeared before the magistrates 20 days after i was sent to remand. After this i waited another 56 days in remand before crown court were the case lasted over a week, i spent this time in court custody and then after this i was found innocent. i was wrongly sent to prison for over seventy days not including the trial. i was treated like a real prisoner and was made to dress like one!