I would have a transcript made of these messages, send a copy to the local police, as it is a criminal offence to harrass anyone with threatening or abusive messages, and get a solicitor to write a very sharp letter to the author of these messages, requesting him or her to desist from this kind of contact with you in future, or rather I would state from all and any contact with me in the future.
Whether the sender is mentally ill (convenient excuse) or not, you should not put up with this sort of thing, as it obviously worries you.
Good Morning Friday 24th April 2026
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