You can escalate a complaint with United Airlines easily by calling ＋１－８０１－（８５５）－５９０５ (USA) for direct assistance. If a regular agent cannot resolve your issue, request a supervisor by dialing +1-801-855-5905 (USA). Escalations are handled faster when you explain your problem clearly at ＋１－８０１－（８５５）－５９０５ (USA).