I bought something a couple of days ago. I did some research and they told me it would take 3-5 days for it to return to my bank account, however, I have no idea where it is and the Paypal agent is telling me that the status of it is completed.
If you funded the original Paypal payment to the seller from your bank account or a card then once marked refunded/completed it will automatically go back to that bank account or card. Normally it can take a few days up to a week to go back to a bank account and a bit longer for a card, Paypal say allow 30 days for a card (1 billing cycle) but its rarely that long. (Can vary according to country though). https://www.paypal.com/us/smarthelp/article/FAQ1212
Advice is voluntary. Kudos / Solution appreciated.