Danger!!! Wither on the loose in Blazefarm

Hello, My IGN Is p_acraft

I summoned a wither at about 4:30 on Monday, June 25th. We were 3 on the servers at the time, me, Danth and Jacobjohnson20. I asked where the designated wither area was, and Jcaob told me there was one in Blazefarm. I went there and I didn't find one. I looked on the forum, but I couldn't find any info. Jacob advised me to make one, wich I did, guided by him. We summoned the wither together, but he started moving around and killed me. I rushed back to blazefarm, only to find jacob running away (I don't blame him). I tried several times to access my items, but failed every time, killed by the wither. It is currently digging towards the blaze farmk, and may reach it soon.

I Just wanted to Report this, So the server could be rolled back, or someone could help me take it down.

Sorry for any chaos I may have caused, if I can be of assistance, please let me know

Edit:the wither has freed himself from the upper layers

Edit 2: with the help from bluemoonwarrior, it was killed