Will not stop sending me unwanted emails

I cancelled my account with Miladys account because of the incompetency of their billing department (not sending my statements via email). My account is now closed and they feel the need to send my useless advertising emails. They could not send my statements but now they bother me with constant emails - I have requested on NUMEROUS occasions via email and followed their links to unsubscribe from the mailing list but too no avail.<br>