Exactly how long will my ban be?

Please, I really have no idea why I got banned. I didn't break any of the rules!! I swear by it. The only thing that might have gotten me banned was that another person made a huge sculpture, and I used some dirt blocks to climb up on it. I swear that might have been the only thing I did! Please unban me, I have a cool home on that server and I promise I won't do it again!
Please.