7-14 working days is the typical minimum time period financial institutions like to have before they consider anything to have not worked correctly, so you'll need to wait at least 7 working days - 14 to be safe - before anyone takes your problem seriously. Try to contact them after a week from today on the 23rd which will be after 10 working days after your transaction.
I got a refund from Goodscore yesterday (15th May) for a payment done (and failed) on 12th May. So it looks like refunds are being processed in 3-4 days.