It's pretty much impossible to get your free annual credit report these days. It used to be relatively painless, but now you get slammed with ads for credit monitoring or whatever useless products. Or, the website just doesn't work, redirect to a page telling you to send a letter to some rando PO box.
I used to get my free credit report every year, but I stopped, which I'm sure is exactly what these scumbags want.
Which website (AnnualCreditReport.com? or the three bureaux' own sites? or some other third-party website (which?)) and what do you mean "the website" just doesn't work?
Be aware there are tons of unaffiliated copycat websites claiming to be the official one and just want to serve you ads; don't use them.
IME AnnualCreditReport.com was easy-to-use and never sends ads. It sounds like you were tricked into using something else. If you genuinely had an issue with AnnualCreditReport.com (unlikely), please do tell the FTC:
https://consumer.ftc.gov/articles/free-credit-reports
I used to get my free credit report every year, but I stopped, which I'm sure is exactly what these scumbags want.