SMS Voicemail Link Service:  what is this?

    iPhone 7+.

    Ios 10.3.3


    I have apples visual voicemail service active. However recently I just started getting text messages with voicemail transcription as well however I do not have voicemail to text service active on my line. When I  tap the phone number link in the text message with the transcription of the Voice Mail it takes me to a phone number that answers with "welcome to the SMS link service." That phone number is one digit different every time I get a text message with a voicemail transcription. What is this? And how do I get rid of it?

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