Klarna Bank AB, generally referred to as Klarna, is a Swedish bank that provides online financial services such as payments for online storefronts, direct payments, post purchase payments and more. Klarna's core service is to assume stores' claims for payments and handle customer payments. Klarna ensures round the clock assistance to its customers. In order to get in touch with Klarna Customer Service representatives, customers across various parts of the world may refer to given contact information. Klarna Customer Service Number: 844-552-7621 Klarna Customer Service Hours: Monday to Friday: 9 am – 6 pm ET Klarna Customer Service Email: customerservice@klarna.com | info@klarna.com Klarna Merchant Support Email: moa.support@klarna.com Klarna Sales Customer Service: shop@klarna.com | sales@klarna.com Klarna UK Customer Service Email: customersupport.uk@klarna.com Klarna Austria Sales Customer Service Email: sales.austria@klarna.com Klarna UK Sales Support Email: shopdirectory.