Stop spamming my business with irrelevant ****

I am sick and tired of beiing spammed by Essentra Components. I own a Beauty School but I keep getting bulk emails from Essentra selling me components for engineering. I block their emails, but then as professional spammers, they they keep changing the email address that they send from. To make matters worse, Yolanda Webber in Sales and marketing promises to get me off the database, but now she just ignores my emails and ignores me. Where did you even get my email address from. I never signed up for your rubbish. I am not interested in your ****, it is totally irrelevant to me and my business. Take me off your database!!!!!!!!!!!!!!!!