MWEB does block ports

Horrible support process. You log a ticket. as soon as they respond its closed. Even if they just ask for more info. They say uncapped, unshaped etc, but recent changes on their network have killed access to my home webserver which I have used for a year on their network. When calling the helpdesk, they couldn't help but if I never changed anything on my side, how come it stopped working? The guy says they dont block any ports. but from a cellular connection I am able to access port 80 on one fibre provider but the mweb fibre is failed. It only shows port 1720 open but the local network has no 1720 in sight. They have something in between. I was able to connect on 443 but its dog slow. Cant wait till I can switch providers without penalty