parents and problematic siblings

Ok so my friend was having a problem with parents and feeling like they arent listening
Just know, i had this problem not to long ago, well the part about being the only one with chores, and between my mom and my dad i was from a ten in mood to a negative ten in thirteen seconds flat, i got mad and yelled back at my mom once, well that dodnt work so i figured out how to get their attention, when i said can i talk to you guys, they said no, as always, so i went extreme, i said ok so my pregnancy will wait. When they heard that i could tell i had their attention, so i just told them EVERYTHING that i thought was wrong, AND THEY FIXED IT. So now the agreement is if i am having other problems then they will take care of my chores, and when im not, i take care of them,
See they may not realize that it seems unfair to you,but if you just talk to them (privately) And the best way to start a conversation with parents is "mom, dad, i have a problem, i was hoping you vould help me with it, can we talk privately?" They will almost always say sure