Yesterday I purchased a Wii U Premium pack from Kmart using the substitution deal (and I thought I was lucky). However, I've discovered that the package has had quite a bit of wear and tear (smudges and scratches on the GamePad/console) as well as some wear and tear on the box itself. As well as that, the AC charger for the GamePad is missing. The AC adaptor for the main console wasn't even tied together with the length of wire all tangled. It's quite likely that this Wii U was purchased by someone else who then didn't put all the parts back into the package (deliberately or not) when he/she returned it.
However, I can't exactly prove that this was not by me. I'm thinking of filing a comment of complaint to Kmart, but I'm not sure if I'm still eligible for a refund/substitution, although their returns policy does say that they do accept product returns where the goods are of unacceptable quality. I do still have the receipt, but I'm not sure that's enough.
you should be fine, usually they are very understanding.
simply walk up to the service counter and ask for a refund.