PP refunds work like this-
1. customer asks for refund
2. seller logs into PP account and finds the transaction (easy to do; you can search by email address, name, date, amount, transaction number, blood type*, shoe size**)
3. seller issues refund
4. a) refund is usually instant if there’s enough in the seller’s PP account to cover the whole refund, otherwise b) refund takes ~5 working days to arrive as the shortfall is transferred from the seller’s bank account to the seller’s PP account and then to the buyer’s PP account
I reckon the longest it should take is a day to actually get round to pressing the ‘refund’ button and then a further 5 working days to receive it. PP are funny with emails sometimes though, I don’t always get emails from them regarding invoices or payments sent (without having bought something) so check in your account for any change in the payment’s status. PP will side with you though OP.
* of course you can’t
** see above