Hey when i donated $25 i got in the game and waited but when it said that it was successful i had a full inventory and i didnt recieve my Mobspawner

 

Well, if you had a full inventory it may have been put where you were standing, or not at all.
You could try posting here after reading it: http://skyblock.net/threads/report-here-if-you-are-missing-donation-perks-net.17143/ (Although it says perks, not items) or contact le Noobcrew via inbox.