It says on the spawner once you watch the info by moving the mouse to the item it says "Warning: Cannot be picked up" in bold letters. This is a warning and if you were planning to do a town, you shouldn't have placed it. Admins won't help you on that aspect, I believe, and thus it'll be there forever. If you try to break it, it'll disappear and then your money has then gone to waste.
Sorry to break it for you bud, but you'll have to buy a new spawner since I don't think the admins are going to move it for you.