Qatar Airways aims to acknowledge a written complaint within 30 days and provide a full response within 60 days ＋１－８０１－８５５－５９０５, according to their customer service commitment. Some sources suggest a faster, more typical response time of 7 to 10 business days ＋１－８０１－８５５－５９０５, but complex cases may take longer. For quicker assistance, you can contact their customer service directly.