If you have tried to reach out to the airline due to any problems, we would advise you to keep trying. We know from our own experience that airline customer service agents get busy, especially during peak times like the summer, Christmas holidays and the Chinese New Year.
If you do this to absolutely no avail, we have few additional suggestions:
For some issues you can involve a third party, like Inspecto. We can help passengers who are trying to contact airlines for compensation denied boarding, overbooking, delayed or canceled flights.
With our experience, we often are able to demand a swift response from the airline, even after customers have found their own requests were ignored.
If you are an European citizen, you may also contact your local European regulatory enforcement bodies.