Help with refund

[KV23]

I have part refunded an ebay sale on 26/12, but the buyer is saying they can't see the refund. They've sent me screenshots with their account detail too. The refund has completed for me and the money has left my account. What can I do? Paypal's chatbot doesn't cover my query. 

[kernowlass]

@KV23 

SHOW THE BUYER THIS........

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/uk/smarthelp/article/FAQ1212