If you feel unsafe, or the person is a current or former partner or family member, speak to the police before sending anything: 999 in an emergency, 101 otherwise. A letter can sometimes make things worse.
A cease and desist letter written around what's been happening: the dates, what was said or done, what you want to stop, and the step you may take if it doesn't. Delivered within 10 minutes as Word and PDF.
Word and PDF, emailed within 10 minutes.
England & Wales
Free revision if you reply within 24 hours of delivery. If the revision doesn't fix it, a full refund within 7 days of your order.