Make room for the other version
Ask what the other person understood before assuming that you are arguing about the same facts. For a message about how to resolve a household utility split, use this factual base: record the property, room, payment, repair, behavior, and relevant lease or household agreement.
Correct the record precisely
Correct only what you can support, acknowledge any real impact, and propose a practical way to prevent repetition. Ask for one remedy with reasonable access and timing, then document what was agreed. Make the immediate next step clear enough that the recipient can answer without reconstructing the entire history.
Agree on a testable next step
Do not enter private space, withhold essential services, threaten eviction, or change locks without lawful authority. Use emergency, housing, tenant, health, or legal support for unsafe conditions, violence, or unlawful conduct. Do not recruit an audience, publish private evidence, or turn a misunderstanding into a campaign about character.