QuickBooks

I need to be able to download/export orders from Zen Cart to Quickbooks Enterprise Desktop 2022 and also to Stamps.com. Some customization is required. I have a web designer (who is fantastic) and he originally set us up with a plugin from 2018 and it is quickly breaking down. I tried Atandra Thub, but their customization and customer service were terrible. Cart Span won't work and neither will Webgility. I am lookig for a company that has customer service in the US.