Go to 'Customer Support' (top right hand corner) then select 'Contact eBay tab NOT 'Find an Answer'. Hover over 'Selling' and click on 'Relisting an Item'. You will be given 3 options - Call eBay, have them call you and online chat.

Your scenario for having a buyer pick up an item then put in a PayPal claim for 'Item Not Received'  is incorrect - there is no PayPal buyer or seller protection for pick-up goods.