Bad Repot Card Grades?

I am 15 years old, just finished my freshman year. And well, my grades have been ad for awhile. And also been hiding my grades. In 8 th grade 1st semetster, I got a 2.33/ which i hid from my parents. they always asked for it the whole second semester. second semester i got a 1.83 because i got really distracted from school becuase i thougt i was a 8th grader. which my parents saw that one. freshman year 1st semester i got a 2.5. which i also hid from my parents. and now 2nd semester i got a 2.2. those grades arent acceptable for my parents, they always want me to get atleast a 3.0. they wnat me to mostly get b's and a's, and c's here and there. and idk if i want to hide my grades again.. i honestlydo want to improve. but if they see my grades again, theyre gona take a way my new phone i just bought with my own money. because they think its that that distracts, but its not. i do my homework in front of a computer.. which i always end up using the computer and starting my hw around 930, finishing at 11. i know i shyould do better next time, but i just want my parents to realize that. theyre not really supportive of school. they just expect me to do good without any help from them. this would be the third time i hid my grades.. and i also just became a vice president for a club at my school, and i would hate to see my parents saying i cant do it anymore. im the only sopre to become a vice president in any club at the school. what should i do !?