you wrote TOprojectdotorg if that is what is actually blocked, then that could theoretically be, because the isp is actually blocking a scam website, that tries to look like a torproject website.
what you wrote WITH an r is a subdomain or whatever or the torproject website.
so assuming, that you actually made a typo here, but wrote the correct name for the support link, the i would GUESS, that the isp is an evil shit, that is blocking access to the torbrowser, because the feds where you are are trying to prevent people’s access to anonymous browsing the web and getting around censor blocks, etc…
in almost all cases isps do dns level blocks, which are easily gone around through using a custom dns server.
i use the cloud flare dns server for example.
which is 1111 1001
it is generally adviced to NOT use the default isp dns server for may reasons, the dns level censorship being one of those, but not the only reason.
and worth noting, that using a different dns server, that is NOT censored does NOT mean, that the isp can’t spy on what you are browser without the tor network or a real vpn.
this is especially worth noting in the worst dystopian places.
so i would suggest to you to look up a guide (it isn’t hard) for your os to use a custom dns server, restart your browser (to clear the dns cage) and then see if the tor website, that i linked and should come up at least as the first link by real search engines to have some basic check instead of just my link works then.
the manual inside the torbrowser also mentions:
If you’re unable to download Tor Browser from the official Tor Project website, you can instead try downloading it from one of our official mirrors, either through EFF or Calyx Institute. (both mirrors have hyper links in them, but having 2 hyperlinks in a comment might get the comment shadowbanned on reddit)