and how i make my account safe

Of course all the errors are inside you because you can't save your account or enter the wrong address when you want to get into your wallet so hackers can get your data when you log in, of course with that incident then you are more careful in logging into your browser or cellphone and the most important thing is to never forget to do a second protection such as verification of cellphone number or second security from Google so that you can minimize your account from hacking.