I've been with Talktalk for a few years now because it's cheap.
So when it works, broadband is fine with nothing to complain about.

Then one time they've decided to block all specific traffic on their talktalk router via an update which rendered my NAS box unaccessible by blocking ports 443, after being sent a few different routers I found out that ports 443 only works using the default 192.168.1.0/24 subnet of which I don't run my network on that subnet. Changing the routers subnet means 443 no longer works (stupid).
So I purchased a Ubiquiti Dream Machine to actually be my router an opened all the ports to that an it works again.

Now my issue is that my router disconnects from their network and their scripted troubleshoot requires me to disconnect and connect to the wifi or unplug/plug RJ45 cable from my laptop or disconnect from my VPN all of which has nothing to do with the issue even after showing connection interface issue and highlighting the issue in screenshots.

I wish I never joined them in the first place.