Constantly mailing me to set up viewings after I specifically said I wasn't interested

<p>This is getting frustrating now. Every few days I receive a template email (seems system generated) indicating that they have scheduled a viewing for me. Every time I respond that I am not interested, and then couple of days later there's another email indicating that they have sceduled a viewing for me.</p> <p>There is no option to remove myself from their mailing list and there is never a response to indicate that my wish to be removed from this list was received and understood. <br />This is becoming SPAM now.</p>