Well Anthony,
I would say this too you, if Jason (uncle) truely has parts that belong too you, i would ask your mom and dad to go pick up the parts that he owes you for. He's not going to respond to anyone on this forum, except with his retoric and excuses.
Get your parents to pick up the parts and wash your hands with this creep, at your age you don't need this BS and you will be much further ahead to deal with someone who honors their deals and never,never deal with Jason again.
JMO
Zip.