sonle 2001, suggest you call 1-800-455-2720, they are open 8am-9pm eastern time. I had a situation and was given that number to call and when I went into the Delta website, saw that it was a "regular" telephone number, in other words, nothing special for me, a diamond medallion. I was a bit skeptical, but called and had wonderful service and empathy by the delta representative.
Try it and if not to your satisfaction, ask if there is someone of higher authority to speak with. I had good results and hope you do also. In my situation, they gave me a credit for the airfare less the change fee, however, in the record is a note that the change fee will be waived when I call to make a new reservation. I wish you well.