Sorry to hear you've been having some troubles with Klarna at checkout! Our Merchant Support team would be more than happy to help you with this, and you can get in touch with them here: https://www.klarna.com/us/business/merchant-support-mail-form/. This form is for our US support team, if that is not the correct country you can select the correct one from the drop down list at the bottom of the page.
We look forward to hearing from you!
Hi again Maurice,
Sorry for the delay in my response.
If you don't have a merchant login, or merchant account, you can sign up for that here: https://www.klarna.com/us/business/. You will be able to generate credentials during the onboarding process, which will allow you to offer Klarna to your customers.
As this is a public forum, and oftentimes support requires more sensitive information, our Merchant Support team may still be better suited to assist you with this. Could you provide me your store URL, so I can take a look at your site for myself?