Text Messages to Gateway

When I went to the T-mobile store near me, they asked me why I was receiving text messages on my router like I should know. They told me there was literally nothing they could do in the store and I would have to contact support online.

Online Support also asked me why I was getting text messages on my router and directed me to change settings that literally do not exist. 

The phone number was attached to a woman that owned a business and received a lot of text messages which would occasionally disrupt my service.

I have no faith in their ability to fix this or prevent it from happening in the future. I can't wait to get out of this absolute trap of a contract.

Edit: “They” changed to “Online Support”