How To Write A Complaint Letter About Transport . I was looking forward to my vacation, but i’m very disappointed. Complaint letter to the general manager of a transport authority. Write a Letter of Complaint Against Bus Conductor/employees from performdigi.com Niramal building, 18 th floor. Band 7.5 ielts complaint letter | letter to the manager of a department store ; Complaining about inadequate bus service in your area and requesting him to take urgent steps in the matter.