Buyer claims I sent an offer, but I can't find any offers sent for this item.Checked sellers hub and listing, but no offers are recorded.She purchased and paid for the item. Here is her question:"Why did the price not reflect the discount offer you made? Can you fix this?"I am puzzled.

How long ago did you send the offer? And how long did she take to actually buy and pay? Send her a refund of the difference since she is going to be trouble. Just another side effect if paying the offer game.