You've only paid for 7 of his 18 years and you are complaining? Unless you were just ordered to pay 7 years ago, you may have arrears. If not, you should be happy that you ONLY had to pay since he was 11. Well, not happy cuz that sucks for your child but you sure shouldnt be complaining.
Five, or six, ten people shall be made temporarily wretched because one person, unconsciously perhaps, yet supremely egotistic and selfish, has never learned to control his disposition and bridle his tongue. - James H. Aughey