Unable to delete VPN

OK, for the benefit of others facing the same issue, I managed to find a solution for my case. I had tried the command line approach using "networksetup -removenetworkservice networkservice" and found that it failed. I thought I should try single-user mode, but found that the usual commands (even the one shown upon single user login) could not be used to enable write to the file system, so that just wasn't going to work. In the end, I booted in safe mode (holding shift key), and then used the same terminal command and it returned without error. Upon reboot, the old company VPN is no longer listed. I hope this might help someone else.

If anyone from Apple is seeing this - why does the command shown to enable write access to "/" upon single user login not work? I tried "mount -X /" as suggested, "mount - u /", "mount -o update", and they all gave a message saying that write access couldn't be enabled.

Yes, feedback from IT was that I'd followed the expected process. They weren't overly interested though as it was a BYOD arrangement. In terms of the VPN being the last remaining service for a hardware port - which hardware port is it bound to? I tried the -setnetworkserviceenabled command and I still get the error re the last service on IPv4.

Has anyone managed to find a solution to this? I could re-install MacOs from scratch, but that is always a time-consuming process that I'd like to avoid. Calling Apple support is useless as my device is too old, although frankly, the issue has nothing to do with the device, it is clearly a MacOs issue.

I still have this issue - is there no way I can remove this VPN entry without re-installing?