I was wondering about this recently because some people are losing chargeback disputes against companies engaging in extremely questionable business pratices.
I just happened to stumble across this on the Federal Reserve site:
Complaints Involving Credit Cards
If you have a problem involving your credit card, first try to resolve it directly with the store or the credit card company. If that doesn’t work, you may want to file a complaint with your state’s attorney general or banking agency. You may also file a complaint with the federal agency responsible for enforcing consumer credit laws for your credit card company.
Credit cards issued by state banks that are members of the Federal Reserve System
Federal Reserve Consumer Help
PO Box 1200
Minneapolis, MN 55480
888-851-1920 (Phone)
877-766-8533 (TTY)
877-888-2520 (Fax)
Email: ConsumerHelp@FederalReserve.gov
www.FederalReserveConsumerHelp.gov
See “How to File a Consumer Complaint about a Bank”.
Credit cards issued by banks with “national” in the name or “N.A.” after the name
Comptroller of the Currency
Customer Assistance Group
1301 McKinney Street, Suite 3450
Houston, TX 77010
1 (800) 613-6743 (toll-free)
www.occ.treas.gov
Credit cards issued by state banks that are not members of the Federal Reserve System
Federal Deposit Insurance Corporation
Consumer Response Center
2345 Grand Boulevard, Suite 100
Kansas City, MO 64108
1 (877) 275-3342 (toll-free)
www.fdic.gov
Credit cards issued by federal savings and loan associations and federal savings banks
Office of Thrift Supervision
Consumer Programs
1700 G Street, NW, 6th Floor
Washington, DC 20552
1 (800) 842-6929 (toll-free)
www.ots.treas.gov
Credit cards associated with federal credit unions
National Credit Union Administration
Office of Public and Congressional Affairs
1775 Duke Street
Alexandria, VA 22314-3428
1 (800) 755-1030 (toll free)
(703) 518-6409 (Fax)
www.ncua.gov
Credit cards issued by finance companies or stores, and matters related to auto dealers, mortgage companies, and credit bureaus
Federal Trade Commission
Consumer Response Center – 240
600 Pennsylvania Avenue, NW
Washington, DC 20580
1 (877)-FTC-HELP (1-877-382-4357) (toll-free)
www.ftc.gov