Goldilocks:
I've had a similar experience at Wally-World. I now never leave a store with a major purchase without opening the box.
I would try going to the Target where you made the purchase and talk to a manager. If they can't help you, ask for their supervisor/higher-up.
You may also want to take a look at this:
http://consumerist.com/2007/05/11/ho...l-carpet-bomb/
and if you need to take it to the next level:
http://consumerist.com/2008/06/17/ta...-phone-number/
Hope this helps!
PS- The Consumerist is a great pro-consumer blog (and were recently bought by Consumer Reports).