Not just high speed, I think I originally got the 40 Mbps plan and they made me get TV cable service when I just wanted Internet. I really don't understand why

Not just high speed, I think I originally got the 40 Mbps plan and they made me get TV cable service when I just wanted Internet. I really don't understand why. They said they couldn't offer Internet by itself. The box isn't even plugged in and hasn't been for years. Everything is handled by a different department by them. I upgraded to the 1 Gbps cable plan and it wasn't just a different plan, it was a different department. They had to take the old modem back and get a new one even though it was already compatible with the newer speeds.