Depending on which store you purchased from there are two ways to claim an item. If you used the new site simply type [claimitem while in game. Fill out the gump that appears and the items will be put into your bank.
A thread explaining this is found here:
http://www.uogamers.com/community/index.php?threads/567376/
If you used the old site you'll type [claimdonation while in game and again fill out the gump that appears. The items are then placed in your bank.
The links to both donation stores are as follows: New
http://www.uohybrid.com/shop/
Old
http://www.uogstore.com/hybrid_store/
Feel free to page in game if you have any issues with your donation.
Thanks for supporting Hybrid!