Disklavier

I recently purchased what I thought was a BRAND NEW Disklavier grand piano from a local dealer.  However, today I discovered an old receipt in the piano's manual from TWO years ago.  The receipt was for the exact same piano that I purchased, so obviously the piano was USED -- worse yet, I actually paid MORE for the piano than the previous buyer.

Is this a common practice among Yamaha dealers -- to resell old pianos as NEW?  I certainly hope it's not common.

Does anyone have any suggestions as to what I should do?  Should I require a new piano?  Do I have any legal remedy?

(My receipt actually states "NEW" on it.)

Thanks,
Iggy