Advertising and marketing, including promotional offers: Credit card

I am requesting an executive review and goodwill adjustment of a deferred interest charge on my Comenity account. I had a promotional financing balance and missed the promotional payoff date by approximately one week. At the time the promotion expired, my remaining balance was approximately $2300.00. Comenity assessed $2400.00 in deferred interest. I understand the promotional terms allowed deferred interest to be charged. I am not disputing the terms of the agreement. Rather, I am requesting a goodwill exception based on the circumstances. I had paid off the vast majority of the balance, missed the deadline by only a few days, and am willing and able to pay the remaining balance in full immediately. I have already contacted customer service and a supervisor, but my request was denied. I am asking Comenity to conduct an executive-level review and consider a full or partial waiver of the deferred interest charge as a one-time customer accommodation.