Jetpack blog subscription

I have a person who has subscribed to my blog via the Jetpack subscribe functionality who claims to be unable to unsubscribe. I can see her email address on the list of subscribers on my dashboard but don’t seem to be able to remove her from the list. As she has pointed out, by law, I need to be able to remove her from the list of subscribers and I can’t. Can someone help me with this issue.

Thanks

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