To dispute credit card charges and resolve billing errors, start by carefully reviewing your credit card statement to identify any discrepancies or unauthorized charges. If you spot an error, first contact the merchant directly to attempt a resolution. If that proves unsuccessful, promptly reach out to your credit card issuer and inform them about the problem. File a formal dispute, providing any relevant documentation to support your claim. The issuer will investigate the matter and make a decision. Stay in communication with them throughout the process to ensure a satisfactory resolution to the dispute.