my isp is Netpoint Communications

yes, there is a brick wall there

i already did everything in that link
i set up my windows firewall to allow it (the only firewall i have), i even tried turning it off completly, nothing worked
i did port forwarding
i have upnp on
i'me pretty sure its not that, since i had previously worked, with the same router, computer, internet, etc.
my isp said they are not blocking traffic to it