Buyers Beware

Looks like me and another user on here got duped into starting a mobile line to “lock in” our internet service price. 
I signed up to get the $50 1GB internet for 5 years, no contract, cancel any time. I go to pick up my equipment and was roped into getting a mobile line added onto my account and told I can cancel at 4 months minimum. I had been traveling from across the country, literally Louisiana to Utah, for 4 days. I just got to the new house and of course you set things up. I go get my equipment cause the sooner the better, right? And here I am too tired to realize I was being lied to. I feel so stupid and I’m also mad. I had to add a $15 or $20 line to my phone to get internet. Not what I came in there for. [Edited: "Inappropriate Language"]