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No worries!

Have a look on the Paypal website as well, and see exactly how they deal with any complaints. That way you'll know what to expect in the event that you have to do anything like that.

IIRC you have 45 days to file a complaint with paypal, so I'd give it a week and see if you've heard back. If you have, no worries, if not email him again telling him you'll wait one more week to...