I would recommend filing a complaint with the Office of the Comptroller of Currency.
The bank has a proven of blatently lying to authorities on complaints brought up. I would also write a complaint to the DE Department of Banking, and copy your Department of Banking in AZ.
The more complaints on their ongoing abuses, the more likely they are to change their practices.
As far as the interest rate, I would dispute it and ask for justification and a detailed explanation as to why you were not notified as required under Federal Law.