Opening an account: Checking or savings account

Issue : Deceptive promotional practices and unfair denial of a $400.00 savings account bonus. I opened an American Express High Yield Savings Account to participate in a $400.00 sign-up bonus promotion. Per the promotional terms, I deposited the required funds via mobile check deposit. The funds physically appeared in my account balance and actively began accruing interest 5 days before the promotional deadline. American Express subsequently denied the $400.00 bonus, claiming that because I was a new customer, the funds were subject to an internal 11-business-day hold, causing the " settlement date '' to fall past the deadline. Being very clear Mobile check deposit was listed as a means to fund the account and I had successfully deposited a $500.00 check as a test prior to the $25000.00 check. It alls showed in my account according and began accruing interest. I attempted to resolve this directly with American Express customer service and supervisors, but they stonewalled me and refused to honor the promotion based on this technicality.