Autopay stopped/not working!!!

I have had Autopay on my account for the past couple of years.  Without fail the payments have come out and the payment account I have on file has not changed.  In the last few months, I was getting notifications that the payment was processed and yet the money did not end up being charged to my banking account I have on file.  The bank on multiple calls has informed me that there was no attempt by Comcast to charge my bank account.  Now I am losing the 10.00 autopay credit and I have been charged a returned payment fee for a payment that was never attempted by you and when I log in to my account it shows that the payment was processed and posted with a confirmation number? Every time I try to go to my billing page it makes me log in a minimum of three times (two factor authentication every single time).  I am trying to pay you and you are making it impossible.