[ Family ] Open Question : trying to convince my parents to get me something? please help!!?

ok so I sold my xbox about a month ago to get money for the new one and I now have the money to get it but its in the bank and its all the way across town. about a 15 minute drive. I keep asking my mom and she keeps telling me to focus on school and stay in football and band and get involved in stuff. I ask her and she says, "well see" or "ill think about it" or "ill talk to your dad about it" and its REALLY annoying. I think shes stalling or something. then she tells me we cant afford it but I already have money and im the one paying. I am trying to be good at home and helping out and reading and stuff like that but it wont work. I don't think there is anything else I can do. Please help me.