The system normally takes a few days to normalize and update your account to reflect the new install properly.
With the Application as you see, it needs to recognize that the modem you are attached to is your dedicated home device, without that, some of the offering is unavailable.
Log into your Spectrum account, and check on your internet devices by going to the internet tab, and you should see the modem you have installed at your home, and confirm the MAC address is right. If you don't see a device listed, then it isn't updated yet and the system is still in need of updates.
This is all done automatically, so unless you change the modem again, it should update fairly soon after install, i haven't ever seen them take more than 2-3 days after installation, but it's not unheard of to not work same day.
You can always call the customer support number, but again, they can't force the device on however they can check balancing on your account and ensuring everything is properly set up for the servcies to work properly.
I post on my off hours, away from work and any statements made are my opinions, and do not necessarily reflect the views and beliefs of Spectrum Communications.