Dear Xfinity Customer,
We experienced a technical issue while attempting to notify you about your XFINITY Internet Service. A copy of the notice was sent to your XFINITY Internet email account.
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If the problem persists, please call Comcast Security Assurance at 1-877-807-6581and reference AUPM Notice.
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That number is for the data usage department so more than likely you are close to or have exceeded your monthly 1TB data usage. You should be able to log into your account to check your usage.