I want to become the old me again. I feel like I'm mean?

I just wanna become the old me again, I feel like ever since I've chanced school 3 yrs ago. I got influenced by the wrong people. Don't get me wrong I'm not talking about like really bad stuff like drugs only like not listening to my parents, talking back, being rude. I'm only 11yrs old right now but I can feel it and I don't wanna be heading to the wrong track… It's like mean girls except I'm not that mean and I don't do the things they do. I used to go to a private school and now I go to a catholic school, but like. I've changed, I have bad manners to my parent (except to strangers or family friends), I don't listen to my parents, I talk back to them, I always get into fight with my mom. I just don't know what to do… I need to old me back. I feel like I'm tearing apart my family and its all my fault. Like I lied to my mom about something and she found out yesterday the truth by my friends moms parents and she told me she was really hurt and that she can't trust me anymore and that I'm not her daughter and she told me not to call her mom. And like I was never like that. I was never texting with bad people, but I was kind of a loner. But I was still a golden child. Now my mom doesn't want my sisters to copy me and she even told them not to copy me right in my face because she was telling them how I was a BAD influence(btw my sisters are only 2 & 5, but they still totally understood) so then I went to talk to them and they said they can't talk to me because I'm a bad person.
I understand that I lied but I think she's being a bit too hard. And anyways besides the point. I WANT THE OLD ME! I have 2 days left of school and I really wanna change this summer, plus my mom took away my iPhone 4s AND Facebook, Instagram, Twitter.etc
So what do I do? How do I gain her trust? Get myself back? And make her love me and think of me as a great child. Please Help I NEED Help As soon as possible! Comment now

Added (1). Btw, I'm an A+ student, I get straight A's and teachers and other kids look at me as an great example, they just don't know what does on at home…

Added (2). Btw, I'm an A+ student, I get straight A's and teachers and other kids look at me as an great example, they just don't know what does on at home…

Added (3). Please no rude comments like um your eleven and stuff like that I DON't NEED IT.
Please just be helpful and btw I do the dishes and clean the whole house every night its my chore and I ALWAYS respect it

Added (4). Please no rude comments like um your eleven and stuff like that I DON't NEED IT.
Please just be helpful and btw I do the dishes and clean the whole house every night its my chore and I ALWAYS respect it

Um, you're eleven, you shouldn't have Facebook, Twitter, etc, so your mother was right in that respect. Just change in little steps and show your parents how much you appreciate them, like doing the dishes one night. Try to be nice to people as well, like instead of saying a snarky comment, even if something is really stupid, just nod your head and move on. Life is life.

ME MEMEMEMEMEMEMEMEMEMEMEMEME MY FRIEND THISS IS MYY LIFE STORY except I'm older than you… Lol anyway you just gota wait don't sneak your phone just be good for a while she will give you back everything… (month or so) I mean I still don't listen to my parents and I like who I'm

You can change if you want there's nothing that can stop you unless you don't want to. You should apologize to your mother for your actions try to be more kind with her say you did not feel very well lately.
and you are feeling better now she will understand you and she will be happy to hear that trust me.
you are not a bad person we all sometimes do things that can hurt someone. Its not only you i think your good person otherwise you wouldnt be telling it to anyone. You are only 11 enjoy you life love your parents until they are still alive.