How do you stop your Ad appearing on sites

[Renners]

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I've currently got a product for sale on Amazon which is the cheapest, so top of the pile and also Amazon are currently out of stock so sales would be good other than I've got a PPC campaign which brings traffic to my site for the same product.

This ad keeps showing on this amazon page as it using the exact product title so the cost to me is more every time someone clicks through the PPC ad to buy the product than through the existing amazon buy link.

I've tried adding the amazon site as an exclusion to the PPC campaign to no avail and I don't really want to stop the whole campaign as it shows elsewhere effectively.

Has anyone else suffered this and found a way to stop the ad appearing?

Regards,
Renners.

[heartinternet]

Are there any negative keywords you could apply that are unique to that page?