Contact the seller and explain ,clearly and politely, what the problem is.
Ask her to cancel your bid.
When/if she does, rebid with the correct amount.
You can also Retract your own bids although the reasons are limited. One reason is that your bid was accidentally too high. (Amazingly often members bid $100.00 instead of $10.00.) EBay asks that you then enter your corrected bid.
