SIM swap scam almost cost me my life savings

I received an email from Xfinity telling me "Your invitation was successfully sent."  It was sent to a person who is apparently impersonating himself as a relative and using my last name.  I never sent an invitation for anyone to join my Xfinity household.  Then it said this person would be required to confirm the household zip code or phone number in order to activate their account.  Big deal!  That is easy information to acquire.  

I never received an alert on my phone app that someone was accessing my account.  By the time I received this message that was sent at 4:32 pm on Saturday, July 19 it was almost 6 pm.  I immediately logged on and changed my password.  Little did I know the damage was done and they were now into my bank account wreaking havoc.  I also did not receive an alert from my bank that someone had logged into my account.  I am still trying to figure that out, too.   At 7 pm I received a succession of 4 emails from my bank telling me that my password had been changed, a debit card added to apple pay, the funds that were being transferred to another checking account that had been opened, and that all text messages to my mobile were canceled.  I tried to call my bank but my phone no longer worked because they had now taken over my number.  

I quickly ran to my neighbor's and asked to use their phone so I could call my bank and Xfinity.  When i contacted Xfinity I found out that all of the info in my account had been changed. 

After dealing with Xfinity all weekend and getting my number back, I still have no answers as to how this fraudster gained the confidence of Xfinity to be added to my account.    I still have their device showing up on my account with my number.  I was told on Sunday that it had been removed and it would take a while for the system to refresh.  Four days later it remains.  

I am seriously considering leaving Xfinity forever over this.  The bank told me that they had dealt recently with several customers who had experienced this with Xfinity.   I am thinking about contacting the local news about this as well.  Xfinity is really falling down on the job of keeping their customers secure and I am not feeling at all certain that this won't happen again.  They need to step up and take responsibility.  Has anyone else experienced this issue?