As stated, you probably don't need to do anything because you notified the bank already. However, strictly speaking, the credit card side of a bank, and the banking side of a bank can be separate entities.
You can amend your bankruptcy petition anytime before discharge to add a creditor. The bankruptcy clerk charges $26 to do this.
This is a very common problem. If you left the creditor off altogether, then you would need to amend to add on the debt. Since you indicate that you already included the same creditor for a different account, you don't need to do anything to include all accounts with this one creditor. Hope this perspective helps!
If not already listed in your original Schedule B, a checking or savings account that was open on the bankruptcy petition filing date needs to be listed as an asset by an amendment, even if it had a $0 or negative balance. if the account was closed within a year before he petition date, then that must be disclosed in response to Question #11 of your Statement of Financial Affairs.
All assets-- even if they have negative, nominal or zero value must be scheduled. Inadvertently omitted creditors may be added by amendment and noticed accordingly. This isn't a material omission; it's fixable so don't stress.
This answer (by San Diego bankruptcy attorney, Asaph Abrams) doesn’t address all facts & implications of the question; it’s general info, not legal advice to be relied upon and exceptions may apply. It creates no attorney-client relationship; it may be pertinent only to CA and/or its Southern District Bankruptcy Court in San Diego. It’s independent of other answers. It may be time sensitive, as in past the “Use by” date: laws and case law change. Hire a bankruptcy lawyer before acting or refraining from bankruptcy or other legal action.
Inform the creditor you have filed a Chapter 7 bankruptcy. Send them the notice of filing and give them your attorney's information and your trustee's information and your case number. Then tell them that if they contact you again they are in violation of the automatic stay.