Unfairly billed

I received a bill after canceling my LTE for the payment of the router. I checked the cancelation email and had to go looking in the fine print that they would charge me for the router. They never sent a reminder (as their terms said they would) or tried to contact me in any other way. I tried using their WhatsApp support but they didn't respond, I then tried emailing and my support ticket was closed. I tried calling and waited on hold for more than 10 minutes.