10-03-2018 9:05 PM
Just ignore them.
Add their ID to your blocked bidder list:
http://offer.ebay.co.uk/ws/eBayISAPI.dll?bidderblocklogin
Close the case once it has been open for 4 full days.
and set your Buyer Requirements to block bidders with 2+ strikes in last 12 months:
http://offer.ebay.co.uk/ws/eBayISAPI.dll?BuyerBlockPreferences