How can I reach Klarna customer service? Customer Support May 05, 2021 20:20 You can reach Klarna anytime at https://www.klarna.com/us/customer-service/ Monday to Friday: 8 am – 6 pm ET. 844-KLARNA1 (844-552-7621) Related articles What is Klarna? How do I choose the right tool for my hair? Is there a fee to pay in 4 interest-free installments? What orders can be paid with 'Pay in 4 payments with Klarna?' How can I return my order? Comments 0 comments Please sign in to leave a comment.