To dispute a charge on Expedia, you can start by contacting their customer support directly via phone at +1-(808)-900-8011, or through their Help Center online. If the issue persists, you can escalate it further by requesting to speak with a supervisor or filing a formal complaint. You can also use social media to bring attention to your case. If all else fails, you may need to dispute the charge with your bank or file a complaint with a consumer protection agency like the Better Business Bureau or the Federal Trade Commission. 
Here's a more detailed breakdown:

    1. Contact Expedia Customer Support:
    Reach out to their customer service team via phone at +1-(808)-900-8011 or through their Help Center. Be prepared to provide your booking details, such as your itinerary or booking number. 

2. Explain the Issue:
Clearly explain the reason for the dispute, whether it's an incorrect charge, a cancellation issue, or a booking error. 
3. Follow Up:
If you don't get a satisfactory resolution, don't hesitate to call back or ask for a supervisor. 
4. Escalate Further:
If customer support isn't resolving the issue, you can escalate it by filing a formal complaint on the Expedia website or by reaching out to consumer protection agencies. 
5. Dispute with Your Bank:
As a last resort, you can dispute the charge with your bank if you believe Expedia has acted unfairly or made a mistake. 
6. Social Media:
Posting about your issue on social media platforms like Twitter or Facebook can sometimes draw attention to your case and get a faster response from Expedia.