How can I stop callers I've blocked (1-404-455-9111) from leaving numerous messages on voicemail?

soflamom

    They're blocked, and I don't hear their calls, but yet they leave 10 messages (maximum to date) at a time , multiple times during the day, which are incomprehensible. After googling the number, I saw results that said it's not even a working phone number. Please help!!!

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