Minecraft Forums

I dont know why first it said i was griefing, then it said i was "possibly hacking" To be honest i dont even know how to hack. What should i do?

I think it really depends on if you were using client mods, such as fly or x-ray mods. Sever admins tend to call them "hacks" As for the griefing part, they could really only have proof if they had LogBlock or some sort of anti-grief plugin installed, so they detect who broke what block at what time.
Perhaps you can send a ban appeal to their forums/site if they have one?

You might have to talk to the server owner to see you if you can be unbanned.

Problem is i cant, i went to the website and i cant contact the owner in anyway.

Do you have some sort of friend who knows the s/o?