Well, it seems you are very angry at your parents. What usually happens child insists to do something and tell his parents about the demand. He does not tries to convince parents in an constructive way. Rather he tries to insist. On the other hand some parents carry a habit of rejecting child's demand as soon as hearing. Both is not a good practice.
Your parents has a long age gaps with you and they like to think in their own ways. Try to convince them in a constructive way, you can show them youtube video or slide show or documentary which supports or emphasis on your demand and then try to tell them in a decent voice. Often parents reject without thinking the good sides of it. They always thought the bad sides or concentrate on risk zone only. Try to place yourself on their position and think and find out why they not allowing you. If you can figure out, try to fix those and approach again in a better way.
Anger is the root cause of all problems AND
Softness/love/patience is the key of success
Note: I am not telling that you approached in an indecent way. I am telling the average case of young child :P
