Blockchain.info address url changed to blockchalna.com
once I logged in.
It was able to deceptively do my login too, this means that blockchain.info has linked up with other hackers to steal all the bitcoins.
No, it means you logged into a phishing site. Did you Google blockchain.info or did someone send you the link? You should have the url bookmarked and check it carefully every time you log in. If you also had 2-factor authentication and a second password this likely would have been prevented.