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Thank you all for your replies.
Thank you MadMen, I've delved into ebay further and started to open a dispute. The section I went into is not ideal, as it's intended for disputes where the item has been posted and things have gone wrong from there. Hopefully I will get a result, for they're trying to charge me £22.59 because their buyer refused to go through with the transaction.
I've also noted to myself, that in future I must not only look at the percentage rating, but actually look at the written feedback given by the sellers, now they're not allowed to give feedback that would affect the percentages.