How to get in contact with a PNC?

Our network status was erroneously terminated (a mistake made by BCBS) and I really need to speak with a human to get this rectified, ASAP! The phone number I was provided is not a valid phone number, which is absolutely ridiculous. I was directed to send an email, which I did, nearly THREE WEEKS ago and have yet to hear from anyone. As a provider, it is imperative that we get insurance issues resolved in a timely manner to be able to provide services to patients that are BCBS policy holders.  Why is it made so impossible to speak with any living being at Blue Cross? The complete lack of customer service options for providers is frankly, unacceptable.

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