551. I am afraid I have got a complaint to make.
552.So far we have not any complaint of this kind.
553. Conducting investigations and mediation in connection with the complaints.
554.Your complaint must me made through the proper channels.
555. I will write a complaint to the proprietor of the hotel.
556. I’m capable of dealing with complaints.
557. I will write to the complaint department about the service in the hotel on the tour.
558. I fear that Vincent is too hot-headed to made be responsible for dealing with customers’ complaints.
559. Would you find dealing with these complaints is a problem?
560. Any complaints about the quality of our goods will be quickly dealed with by local branches.