If your cashback claim has been rejected then we're really sorry, but there is very little we can do.
When cashback claims are rejected, we may not be informed of the reason. Frequently however, the reason is that the merchant has already paid your cashback as commission to another website. This means that they identified another website as having provided your custom.
This might be another cashback site, the source of a coupon code but equally it could be a comparison site or even a search engine. It may seem harsh, but there is really virtually no chance of getting back your cashback if it has already been paid to another website.
This is why we are very keen on members clicking through to merchants and completing their transaction immediately and wholly online. Even better would be if cookies could be cleared immediately before clicking through - this would then reduce the chance of your custom being linked to another website.
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