Tell HN: HackerEarth will not unsubscribe you

I was pursuing a job opportunity, and the company was gracious enough to sign me up for a coding test from Hackerearth. I figured out that I did not want to work for said company, so I unsubscribed from HackerEarth email. Three times now. Despite this, Ive received at least 1 email per day from them with the most annoying(to me anyway) sort of sales tactics.