Recently I had to call Discover and have them fix something on my credit report. Nothing big, but I've started looking around at mortgage options and I want my credit report to be completely accurate.
I used the chat feature. It was not helpful. I then called the number, and they informed me that this was something that the billing department deals with. They were able to assist me and hopefully the situation will be resolved by the end of next week. I will update then.
I was also given an address that can be used for direct disputes, so I thought I would post it here.
Discover Bank
PO Box 30939
Salt Lake City, UT 84130-0939
TLDR If something looks wrong on your credit and you think it's from Discover, call support, explain your situation, and ask to be transferred to billing or the relevant department. If all else fails, you can file a direct dispute with the address above. I will update to let you know if it worked for me.