How can hacker hacked my wallet this time where I created totally a new Address.
Well for sure you have some malware made by hacker on your device , which is the common reason why hacker still can see your new eth wallet information such private key as well, if i was you try reformat you device immediately to avoid further losses , 'cause if you let that malware will stay on your device ,hacker will be able to determine all of your important files or personal information especially accounts in different sites. So back up now then reset your device.
Oh man, what rotten luck! I guess that was some phishing malware. You have to check not only your PC, but also wi-fi router, cause there are some viruses that can monitor outbond traffic and steal your passwords, keys, etc.