| 1 | I want to complain about the poor service of this company. | |
| 2 | The company is committed to thoroughly investigating any customer complaints. | |
| 3 | How to solve the complaint problems of the customer service department? | |
| 4 | We have received many complaints about the quality of teaching. | |
| 5 | I want to publicly complain about the unprofessional behavior of this doctor. |