Support blame our website

Apparently the failure of the payments gateway implementation is due to our website, even though multiple other gateways work fine. Klarna support could only point the finger and tell us that if we re-platform some day to get in touch. Absolutely ridiculous, yes we will rebuild our website to use your payment gateway. It seems there focus or interest sure isn’t in the Woocommerce platform.
We were never able to deal directly with a WordPress expert or anyone that understood the plugin, we were told that our site had incompatibilities, pointing to the Aelia currency switcher, I had to correct the support person and show them the documentation where it specifically states that this plugin is supported!
I asked for other site examples running Klarna so I could investigate the technical side further, I even insinuated that we would pay to have an experienced dev to implement, no response to any of this. How can we implement if we have no access to any experts who understand both Woocommcere and Klarna?
If you are after a finance option to offer your customers, opt for zip or afterpay where integration is flawless and customer service superior. Klarna has been a big time waster, even the sales person who sold us on the usage of the service fails to respond.