Go to the Appeals section and make a ban appeal. Make sure to use the right format.

how do i get to appeal

I'll link you to the section. Were you banned on .net?

There's a .net appeal section, click "create new thread" and use the correct format.

Create your thread here: http://www.skyblock.net/forums/net-appeals.192/
Use this format: http://www.skyblock.net/threads/ban-appeal-form-read-carefully.6/
Make sure to read these rules first: http://www.skyblock.net/threads/ban-appeal-forum-rules-read-before-posting-a-ban-appeal.13552/