Ask a Business Lawyer. Get Business Law Questions Answered ASAP.
At this point, your only legal option is to sue Chase Bank in small claims court and hope that gets their attention. Sometimes it is more effective to just have a lawyer send a letter on your behalf threatening to sue them. You can usually hire a lawyer to do this for $100 or so, which may be a worth investment at this point.
The downside to suing them is that it may delay you actually getting paid. They may have a process wherein they won't pay at all until ordered after you sue. This is speculation, but it is possible. In any event, this is your only option legally.