Hello,
I'm Jane, happy to help you today. I'm very sorry about your problems.
Messages cannot presently be blocked. The only option is to adopt an address book policy in Teams that will only conceal your support email address.
However, if you are concerned about blocking contact in Teams, it is recommended that you please vote the feature at https://microsoftteams.uservoice.com/forums/555... and leave your good ideas there.
Please let me know if you need help with anything else.
Sincerely,
Jane.
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