on 12-07-2013 12:43 PM
You are well within your rights to refuse the purchase as it is not as described.
Revision is not possible after bids, however you CAN add to the description in large letters as well as contact all the bidders to explain the error and those that were not interested could then retract their bids.
I suggest messaging and explain the advice you have been given is to ask the seller to open a mutual cancellation which you will need to agree to so seller gets their fee back. After it's cancelled, neither party can leave feedback.
If seller opens unpaid item case, contact ebay and explain you have message from seller stating description is different.