Phrases Complaints and Suggestions

I have a complaint about...

B1

Meaning

Formally stating a complaint.

Example sentences

John: I need to speak to the manager.

Alice: Certainly, sir. What seems to be the problem?

John: I have a complaint about the service I received.

Alice: I apologize. Please tell me more about your experience. Perhaps we can resolve the issue. If you'd like to submit a formal complaint, I have a complaint about the way this is being handled.