Yesterday marked the end of the seven full business days Chase said it would take them to respond to my claim, but I hadn’t heard a thing from them, so I called them this morning. They said a refund check was mailed today. Assuming they’re telling the truth, it looks like I won’t have to go through the hassle of disputing the ACH transfer with my bank.
Hopefully this will be the last time I ever have to deal with Chase.