Recently tried to use dundle.com to buy a voucher (around 50$) and paid using cryptocurrency.
Only after receiving the money they ask you verify your payment by sending them a copy of your ID within 30 minutes otherwise "you'll be refunded automatically" (within an hour up to 5 days). WTF! As there is no abort possibility you have to click "verify now" and afterwards there is "Cancel" button. But guess what, if you click it, you end up in an endless loop. No refund, no voucher, money gone.

Thoughts:
If you have to do KYC stuff, tell people before the payment.
If you want to collect personal data and use KYC/AML regulation as the reason, do it when transaction has a reasonable size, not low value transactions.
If someone can't or doesn't want to send ID refund the money and don't steal it.

TL;DR
Confirmed: Korsit b.v./Dundle.com is a big fat scam