State the boundary in operational terms
Say that you do not want calls, messages, visits, gifts, contact through friends, or new accounts. Name any narrow exception for children, property, or legal matters and its approved channel.
Do not negotiate the emotional case
Avoid listing every reason or responding to promises that this will be the last conversation. Repeat the boundary once if needed, then stop engaging.
Treat escalation as a safety issue
Save records, tell trusted people, secure accounts, and use platform reporting, specialist domestic abuse services, police, or legal advice as appropriate. Immediate danger requires local emergency services.