You just gave us a list of sites that big ISPs pay to be featured in their comparisons, and that almost certainly get a further payment if you click through from there to the ISP's site. A very small number of ISPs compared to the hundred or more out there.
As XRaySpex says, you could try haggling, but I doubt if you will get anywhere.
You could ask Entanet, who provide wholesale contracts to small suppliers, but I expect they would want a few more than three customers from you.
As you seem to be focussed on price, am I right to conclude the quality of the service is irrelevant?
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost
. Internet connection -
IDNet Home Starter Fibre. Live BQM
"Where talent is a dwarf, self-esteem is a giant."
- Jean-Antoine Petit-Senn.