You cannot stop people from attempting to phish well established websites, or your personal emails after they may have purchased a list with your email address on it. Or found it by searching.
You cannot prevent ordinary citizenships or self employed people or people who are running unsuccessful businesses attempting to phish out of desperation.
You cannot prevent scammers and spammers either professional or amateur attempting to phish websites such as this one.
All you can attempt to do is either try to identify via software, or ignore or report it, to italki or the authorities in your country, if they have any spam reporting facilities.