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 How do I choose the right tool for my hair? How can I return my order? How do I pay in 4 interest-free installments? Comments 0 comments Please sign in to leave a comment.