Who do I contact if I have questions about Klarna? June 18, 2021 03:20 Updated For any queries about Klarna, including payments, declined orders, or your Klarna account, contact Klarna Customer Service. For more information about Klarna, visit the Klarna website here. Back Home Related articles How about your shipping information? About Us Can i exchange another size? How can i cancel my order? Can I change the card used to make payment?