Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
The company you are porting through needs, from the sound of it:
1. the correct 'numbers' (IP Address(es)), of course, but also
2. to be allowed access through firewalls.
Firewalls in your local networking may be blocking access from the 'company' you speak of, since the company in question is out on the internet, and must access your cameras through your local gateway-to-the-internet box, and that gateway box (and perhaps your local router box also, if the two are different and if you have both) has a firewall to prevent illicit and unwanted access generally from outside (on the general internet-at-large) to your local network.
So tell me about how the cameras connect to which local box, and how that local box is connected to the general internet, through what other boxes, computers, etc. And I will advise you more specifically.