If, after making your reservations with Southwest, you have any difficulties using the airline's website or if you are unsatisfied with the process of your reimbursement for a cancelled flight, you may quickly file a complaint using the company's official website. To complete this, visit the website and look for the "complaint" option. Additionally, you can reach Southwest Support Phone Number +1-888-413-6950,which is available 24 hours a day, 7 days a week