Oustanding Balance from Account that doesn't exist?

[bap1130]

I have received multiple emails indicating that I have an outstanding charge on my account of $35 ("although your service has been terminated") even though I have paid every bill using auto pay. When porting my account over from Xfinity Mobile, there were a bunch of issues and I believe one of the tech support individuals set up a new account.  This account number is different than the one that is on my current plan.  In multiple run arounds with VZW customer support, no one can find this outstanding charge. However, now I am going to get hit on my credit score with a late payment for a bill that doesn't exist!

This is not spam - the from email is ecrmemail.verizonwireless

Hi Brent,   Although your service has been terminated, there is still an outstanding balance in the amount of $35.0.   If you have already made payment, please disregard this notice.   Please be advised that nonpayment may result in Verizon providing negative information related to your account to the three major credit bureaus. We urge you to take this opportunity to avoid collection agency contact, and/or impact of a negative report to your credit profile.   For questions, you can call us toll free 24 hours a day at 866-266-1445.   Important Credit Reporting Notice: Non-payment may result in Verizon providing negative information related to your account to the credit reporting agencies.