Pickup code

I am new to selling on ebay as I have always purchased but never sold anything in the last 20 years. A buyer recently picked up an item and he said that he will message me the pickup code as soon as he will arrive home as he doesn't have remote access to his email address. Now he is refusing to give me the code despite multiple messages and he answered the phone once and he said that he will not give me the code. What can i do? No options to contact ebay about this or paypal as all options are automated and specific about other matters but except this matter. Anyone has an idea how to get this resolved as payments are on hold with ebay. Thank you.