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If your United Airlines refund was denied, call +1-833-770-4333 immediately to appeal and reopen your claim. The refund team at +1-833-770-4333 can review your booking, verify eligibility, and help you submit supporting documents for reconsideration. In many cases, refunds are denied due to incomplete requests or missed deadlines. By contacting support, you can provide proof of cancellation, medical emergencies, or schedule changes to strengthen your case. Always keep your email confirmation and payment receipt handy when appealing your United Airlines refund denial.