It should automatically show up in-game after you donate for it.

it can take up to a day for it to show in game sometimes. Buying it is what activates it.

Thanks for the comments. I still havent received anything but will keep checking today.

If it doesn't come through in a week since you've purchased go to this thread http://www.mineverse.com/threads/mineverse-support-email.5743/ to get the support email and email them the problem, it'll get seen faster then it would of if it was a thread.

Thanks, but I have already mailed them and still no answer.

:/ I have no idea then, sadly I've said as much advice as I can give you, sorry.