Do you support the NETbilling gateway?

Unfortunately, we do not have integration with NETbilling. I think you mean this website https://www.netbilling.com/.

I have raised this thread to our backend team as a feature request for NETbilling payment. Please note that we cannot give you an estimate as to when this feature will get implemented or if our developers will consider adding such in the future, but as soon as we have an update, we will let you know here.

Thank you.