Stuff happens. Sounds like a communication problem. Things don't have to be the way they are. The person on the other end of the phone is just going through the motions and unless you make it happen it's rare to find someone who'll go beyond what that. Ask them if you can buy a different one and have it coming to you while the other is going back, of course a refund needs to happen when it's returned.

As far as the target, you should have done your homework. They are not all 12x12. They also are not thought of very highly.
http://www.basspro.com/webapp/wcs/stores/servlet/Product_10151_-1_10001_95175_400014000_400000000_400014000_400-14-0

I personaly don't buy layered targets. I like the soilid. Cabela's makes a good solid one for around 35.

It's hard to tell from the pic which one of the 2 targets you bought, but based on what you got they definetly misrepresented the product. I'd push it. If you were supposed to get the "range" target for 20 bucks, Woo Hoo.I'd change my mind about a layered one.