Apple retrying payments...when I have already bought the item

I purchased an iPad not realising my work cheque had not cleared. I got an email from Apple telling me that it could not be processed so I waited until I knew they money was in a re-ordered the iPad. I got it today just fine until unbeknown Apple have retried the previous payment and subsequently I have bought two iPads....and there engraved? Apple have told me when the first iPad comes that I was under the illusion had been cancelled to refuse to sign and have it sent back. Are they going to give me a refund?