Thanks for the replies never thought of TTB themselves.
TTB always used to be a 24 month contract. For someone who paid extra to Uno yo be a one month contract and presumably picked Pulse 8 for the same reason that must be an important consideration for you.
What about IDNet? They use BTw, TTw and Zen for backhaul, so you could request a TTw connection. They will switch you from one backhaul provider to another without charge if you are having performance problems and it is only a one month contract. Not that much more expensive than Pulse8, if you pay annually up front as you get a one month discount.
I'm still struggling to see how you can migrate to another ISP if your line is blocked though.