Woocommerce Payment Integration Fix

I'm seeking an experienced WooCommerce developer to fix a payment issue on my site, https://www.vio.se/. Currently, it displays "payment is unavailable."

You will need to integrate the following payment methods (already connected and API put in put does not work):
- Klarna
- Swish
- Invoice
- Card payments
- Apple Pay
- Google Pay

Requirements:
- Proven experience with WooCommerce and payment gateway integrations
- Familiarity with Klarna, Swish, and various card payment processors
- Ability to troubleshoot and resolve payment-related issues

Please ensure that the site is fully functional and secure after the integration.