Hola!
I'd be delighted to help you get back up and running with your CCTV access on a mobile. It shouldn't be too difficult, but will require a few things:
1. I'll need to remotely connect to a computer first where the cameras are visible to check some custom port settings and IP addressing
2. I'll need to access the router/modem that is in the same building as the cameras/DVR to check it's config
3. I'll test the connection remotely for myself,
4. I'll get you to test the configuration on your mobile.
I'd love to get it done for you, and look forward to getting you sorted!
Please let me know if you have any questions, or any feedback on my bid. I welcome a discussion.
Many thanks!
Evan