Hello, I left a bid of £25... the piece sold for £18 to another bidder. It seems you did not bid for me?????

Hello Nick,
Thank you for your question about this item. The error is on your Completed tab. eBay sent us a message that your authorization was revoked. You must re-authorize in BidSlammer preferences.
Please let us know if you have any other questions, or require other assistance. We are happy to help.