Data usage

I noticed that I’m still being tracked on my daily usage, and also I’m warned when I get close to maxing it out each month. I had thought spectrum was unlimited. Do you have to change plans to get that or ask for that unlimited plan or have they just not changed it over yet? Also, I currently have the 250 megabyte speed plan and I’m wondering, isn’t there a lower one as I just retired and looking at still wanting Internet but not as much speed as needed. Thank you.