Rate increase on mobility plans

I just got a 4$ increase on my monthly mobility plan- anyone else got this? I contacted customer support and they said it is to “improve service quality” and that it was applied to people who don’t have a conract with Rogers ( contract refers to BUYING A PHONE from them). I was literally promised that my rate would never change when I joined them and now they wanna charge me 4$ extra every month. I know this was because of the stupid activation fee removal (which i had to pay so no benefit to me) and now instead of taking a one time dumb fee they will milk us out for our whole lives. What can we do about this?

Sidenote:
Anyone paying less than 40$ for mobility with rogers or any other provider? If yea put me on man I literally just want to call and text.