How do you stop a buyer buying from you in the future
REMEMBER TO BE HELPFUL. ANSWER WISELY
Add their ID to blocked bidder list:
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Add there user ID to your blocked bidder list here,http://pages.ebay.co.uk/help/sell/manage_bidders_ov.html
If you want to find that link again for yourself, go to Customer Services (top right) and type 'Block bidder' in the Search box. The links you need will come up.
Sorry, that should have said 'Customer Support', not services.