i resolved the problem, eventually i found the person that configured the router last time, he told me some passwords that he usually use, and one of them worked.
if someone else is having the same isssue, as far as i know, if you don't know the console password, the bootrom password was changed from the default one, and you don't know the web/cli user and password or it has been disabled there is no way to reset them. you need to know one of them