I have the same issue... I have a Bell Home Hub 2000, and the screenshots provided by the 'unblock' representative don't apply... As far as I an tell Bell has locked down their modem so you can only setup an automatic DNS, and not static, maybe intentionally- who knows.
I have the Sagencom modem, and to get Blockless to work I connected an old Linksys router to it. Then I put the DNS values in the Linksys, and everything works great. Perhaps that will work for the HomeHub?
My advice, from my own experience, is to do away with Bell as there IP provider (see this: https://www.newswire.ca/news-release...592482311.html). I switched to Teksavvy and haven't had a single problem since. It's my opinion that Bell likely know exactly what they are doing yet won't tell their customers leaving them to waste sometimes weeks of work in an attempt to resolve their issues. Just try dealing with port forwarding let alone dns!