Telephone issue

I currently have two telephone numbers, with both phones plugged into my Hub.
My TV package ends soon, so I contacted VM via chat to get options. 
The package I was offered supposedly contained everything I have currently but on checking I noticed that "+1 Additional Line" was missing. When I queried this with the agent I was told that I could not have two lines. Even when I explained I already had two, and gave the phone numbers, I was still told I couldn't have two numbers at renewal.

This is the copy-and-paste from the transcript:

"the additional landline was proffitable for us only as you would be paying to us, but as we have no further availability, so we are unable to provide the services further. Otherwise, why I would not get you the addon service when you are paying for it."

Can anyone explain why I supposedly cannot have something that I already have? Thanks.