Mom thinks I'm useless, worthless etc?

Today, my brother said if I ever saw him, i HAVE to say hi to him or else he won't pay for my phone bill for a month, no 3G data, no texting or calls. (Tip for later: my parents are divorced.) I called my mom to tell her that, but she was working. Later, when she came home from work, i told her and she was like 'Ok. Well I know that the phone psrt wasn't nice, but you have to be polite to people and say hi to everyone like your family.' And throughout the day, she has been lecturing me about the importance of saying Hi to people/ greeting people. I was just bugged by the phone bit, not the saying Hi part of the whole problem. After swimming, I argued with my mom because i said i was only bugged by the phone part, not the other part. But I think she thought i didn't care about the saying Hi part and she said my dad was horrible at greeting people and stuff and he can't greet people properly. And she said i was just like him. And she called me worthless, useless, won't succeed in life etc. Now she's telling my brother about my 'fits', and he'll be like, you're not listening to mom, i'm not letting you have your phone plan for 1 month!' Or something like that. Also, i love my father very much and it hurts me that my mom still thinks as him that way. I also know that the phone part isn't real, but it was a way to get me to say hi to people. It still bugs me tho, if i was his big sister, and i gave him an iphone, and i told him if he didn't say hi to me every time he saw me i wouldnt pay for his plan for a month, would he think that's fair? Also, i'm a very sensitive person, and some things make me cry. Just to let you know. What do you think about this situation that i got in today? And how would you deal with this?

Okay, first, there's a world outside you. But you don't have to say to everyone all the time. I mean sure, it wouldn't hurt to have a little conversation with your brother or your mom. Plus, your brother paying for your phone bill for a month. Take the deal. I'm guessing your brother is older. He just wants to spend a little time with you. But your mom's lecturing on greetings is a little too much. Plus topping it off saying you are like your father, not good at all. You are not worthless or useless. I know you can succeed in life with hard work and dedication. What your mother said about your father is low blow and I think you should have a talk with her about that. You should ask if she really meant those words. Only then will she realize her mistake and that you are your own person with your own personality. In someways you and your mom are both right and wrong. But that's what makes us a person as we have our flaws. I hope I at least was able to help in someway. If not, then you can disregard this message all together.