We're pretty confident that if you match the criteria in the post (played less than 20 hours, haven't logged in 3 years, never bought or received anything) that you probably aren't coming back and don't care about your account being deleted or not.
Anyone affected by this will have a 30 day window to prevent the deletion of their account by following the instructions in the email that they will receive.
In the unlikely event that you have not played in 3 years, did not play more than 20 hours, did not buy anything, and did not respond to the email in the 30 day window, and are still annoyed that your account is deleted, I'm afraid we by design will not have any recourse for you - the deletion is final, and cannot be undone.