We're sorry to hear that you have run into difficulty making a payment for an item. Please be aware that our service has nothing to do with making such payments - it merely places your bids for you in the final seconds of an auction and the rest is handled by eBay as with any other bid.
The payments you make for winning items must be handled via eBay. From what you have shared, it looks like there was an issue with your sign in so eBay could not display your data at that time. I suggest you try logging in to your eBay account again and then looking at the item won. If you run into trouble logging in on eBay, try clearing your browser cache to ensure that no pages have been erroneously cached and then try again.
If the difficulty accessing your eBay account or your won items continues, please reach out to eBay support for assistance.