You will hear a conversation through a phone. For each question(23-30), mark one letter(A, B or C)for the correct answer. After

A: Good morning, Chinacom Mobile. Wang Hua speaking, how may I help you?
B: Yes, good morning. I would like to make a complaint about my bill, it’s ridiculous!
A: Certainly, sir. Can you tell me exactly what the problem is?
B: Well, I received my bill yesterday and you have overcharged me: it says I made several calls from Shenzhen to New Zealand between the 13 th and the 24th of August, but that’s impossible, because I was in New Zealand on the holiday at the time!
A: I see. Could you give me your full name and phone number, please?
B: Yes, I’m Shirley Lee and my number’s 862 8503 , alright?
A: That’s fine, sir. I can see the calls registered here on my screen. I will have to check this with my technical department. Our customer services department will call you as soon as we have fully investigated your complaint.
B: Well, how long do I have to wait?
A: It usually takes 48 hours to check all the technical details. Our customer services department will call you as soon as they have fully investigated your complaint.
B: And then?
A: Well, depending on the results of the investigation, we credit the overcharged amount to your account or send you a check.
B: So I just wait for a call from your company?
A: Yes, sir. Someone will call you within 48 hours. Thank you for calling and bringing this matter to our attention.
B: Hmmm...goodbye.
A: Goodbye, sir.