Phishing attempts allowed by Xfinity

I find it extremely suspicious that phishing attempts from a third party started the day after switching to Xfinity. There is almost certainly a deliberate or unaddressed leak of personal info, and from what I have seen online posted by other folks, this is a well-known problem. 

The phishing attempt uses 1-877-392-1494 as their callback number. 

Please do better by your customers. This is unacceptable.