I donated a while ago and my Premium rank has come up on every server but Op Prison.
VVVVVVVVVVVVVVV--Proof I've Donated--VVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV

 

http://www.mineverse.com/threads/mineverse-support-email-help-template.5743/

http://www.mineverse.com/threads/help-i-lost-my-rank-on-op-prison.35280/unread

There is some problems with buycraft in Opprison. Many people doesn`t get their ranks and sone lose it. The staff are trying to fix it.

 

Should of been fixed by now. If this still hasn't been resolved then please send an email to [email protected] providing proof of your rank and your IGN. Archiving.