If you want a sub, save your pocket money up and buy one. Why on earth do you really think that someone will just buy you a sub for no actual reason ?? or even if there was a reason why would they do it ??
Did you honestly really think that anyone would actually say "yeah i will buy you a sub" ? get fucking real.
Why dont you start by asking your family you are playing with to sort you out and not just random people.
So what are you actually offering in return for getting you a sub ? is there any form of payback ?