If you think the ban was unfair, post a ban dispute
here.
And I highly doubt you will be unbanned by several reasons.
1 - You probably got banned for hacking and you just wanted to look good over other people. 'liar'
2 - You are mad because you get caught hacking.
3 - You most likely will not get a refund/unban because you made this thread.
And just my opinion here, you're probably not good at Minecraft PVP.