I suspect you did not update your new email addy in the payments paypal box during the listing process so the payments would have gone to the old details.
To go check go to ebay and do a pretend sell > go only as far as you need to go to be able to scroll down to the payments section > now look in the paypal box, is it your old details? If so you need to change them next time you list an item to sell.
If you still have access to your old email addy then add it to your paypal account and the money will come with it. You can have up to 8 email addys on the one paypal account.
If not check with your buyers if the payment is unclaimed or unclaimed with a cancel option. Then come back for more advice.
Advice is voluntary.
Kudos / Solution appreciated.
