I definitely think you just typed something wrong. Before acting as a SuperUser (see below), carefully enter the command again. If both of our spellings of the network service name is correct, you can just cut and past the command I typed below. Leave out the sudo though, unless it returns "Permission denied." Be sure to check the spelling of the network service name.
Wow!! Looks like a dump of every possible command in the networksetup collection. I suspect you either typed something in incorrectly (most likely since it says it can't find the command) or 10.9.3 wants you to act as the root user (SuperUser) for this command. I don't remember if that was true under 10.7 but I don't think it was. Also, if that's the only network service available for a hardware port, you won't be able to remove it this way. If that happens to be the case, see the description at the bottom, which describes the -removenetworkservice command. If that's not the case, and there are other network services on this port, keep going right here.
To act as the root user (SuperUser) and enter the command to delete the network service, enter (I'm assuming my spelling is correct; check it):
sudo networksetup -removenetworkservice "VpnOneClick- l2tp France Ip"
You will get a prompt for Password:
Type in your administrator password. You have to be an administrative user to do this, which, if it's your computer, you should be.
Nothing will happen as you type the password. The cursor won't even move. Then, hit return.
If this works, check by entering: networksetup -listallnetworkservices. If all went well, VpnOneClick- 12tp France Ip should be gone. Quit Terminal. You don't want to be logged in as root for any longer than necessary because all safeguards are gone and you can do a lot of damage by mistake.
sudo stands for SuperUser DO.
This is from the command: man networksetup:
-removenetworkservice networkservice
Use this command to delete a network service <networkservice>. You cannot use this command to delete the last remaining
service for a hardware port. To do so, you use the -setnetworkserviceenabled command.