Bad advice, and won't stop calling and pestering m...

Bad advice, and won't stop calling and pestering me even after I requested them to stop. I've had to block their number at work so they will stop calling my line. They called twice today. Once they didn't get through to me and the second time, not even a minute later, they called our front office to try and get through to me.
I do not appreciate being hounded down and given bad employment advice. I understand I downloaded your form for research purposes, but that does not mean you are welcome to call me every SINGLE day until you finally get the hint that I do not want your services. I intentionally did not check the box that said that you are welcome to spam me.
Last time I downloaded a form I had to email the gentleman and let him know that I wanted off the call list. Low and behold they start calling again.
Terrible tactics to get business.