In addition to eBay's Money Back Guarantee, which is available for 30 days from delivery (or last estimated date for delivery) you are also covered by Paypal's Buyer Protection which kicks in on payment and can be used for 180 days (six months).
If you also used a credit card to back your Paypal account you are further protected by your card's chargeback program.
If you explain how your transaction went wrong, we may be able to help get you a refund.
For the other bids, you can retract bids for a limited number of reasons or you can ask the seller to cancel your bids, although she is not required to do so.
https://ocsnext.ebay.ca/ocs/sr?searchstring=retraction&submitBtn=Search