my farm and town spawn has been greifed

]Minecraft Username:[/b]
stevenjr05
Affiliation:
mayor
Town Name:
powtown
Town World:
rising
Is the Grief located in the Wild? If so, is there a pending Mayor application for this defined region?
no in the town
Co-ordinates of Grief:
x11817 y63 z-14483 x 11889 y63 z-14447
Brief Description:

Which users own the griefed area, or are allowed to edit blocks in the area
town farm and town rules board and coco farm the farms are public other than that u need to replant and the rule board is a area that only has the rules stated and nobody is supposed to touch any of them
Screenshots to assist Staff identify the grief:
I have none but go to /warp powtown the farm and right in front of the warp was my coco farm and the walls where filled with signs
Rollback:
at x11881 y63 z-14464 there are 2 high poles of cocoa on all sides about 30 poles
and the top part of the farm had wheat and carrots evenly spread out and pumpkins on the second floor and melons on the bottom also my rule board had 40 signs in total and about 10 blocks of glowstone was stolen