oral complaint meaning in English

口头起诉
口头申诉

Immediately upon receipt of oral complaint by any staff , should become attentive to the complainant , and should try to understand the grievance
任何职员接到口头投诉后，应立即关注该投诉者的需求， ?弄清楚他?什麽会提出投诉。
Channels for complaints for written or oral complaints , we shall provide an interim reply within 10 working days . after that , we shall provide a full reply
就书面或口头投诉，本署会在十个工作天之内给予初步回覆，随后再作出详细的答覆。
Receipt of a written complaint will be acknowledged within 3 working days . acknowledgement of receipt of an oral complaint would also be issued if so requested by the complainant
电讯局会在接获书面投诉的三个工作天内认收投诉。如投诉人要求，亦会认收以口头方式作出的投诉。