I had to report Chase to their national regulator due to the runaround they gave me to close a dormant account. I finally wrote to Jamie Dimon (CEO) directly to put a stop to it.
In a separate issue, they managed to drop a digit off my mailing address and NOT INFORM me that there was a balance outstanding for a few months (despite having email and phone for me which were correct). The rep even mentioned that the letters had bounced to them to that nonexistent address. I had to go to the executive office to waive all the fees.
Finally, have you seen their horrible website? I changed cc numbers over time (moved from airline to cash rewards; they sometimes send out a new #), and they NEVER DELETE the old cc#s. So it looks like you have 8 accounts when you might have 3 cards. You can only get 90 days of historical transactions.
While the individual people seem to be trying their best, the institutional dysfunction overwhelms their efforts.