I'd like to help, but first you need to help me

Where did this happen? Can you give me coordinates?
When you're on the server, press F3. That will show a lot of stuff on your screen, including your coordinates. You can then make a screenshot by pressing F2 in-game. Screenshots are stored in the directory: %appdata%\.minecraft\screenshots

Those screenshots you can attach to your post using the Insert Image button on the text editor you use to make posts:
Name:  Insert Image.png
Views: 199
Size:  3.7 KB

And then we know where it happend, see the damage, and fix things