The mysterious phone call

I woke up in the middle of the night from a phone call. I sneaked out of my room and answered it.
''Hello?'' I said.
''Can I speak to your mother?'' said the voice.
I checked on mama, she was sound asleep. Then I went to the phone and told this person that she was sleeping.

I still didn't recognise the voice.
''Who is this?'' I asked.
''I'm Anne Wilson and I work in a paper shop,'' answered the voice.
''But look, this is urgent, I need to speak to your mother,'' Anne went on, '' I need her to give me her phone number.''
''But Miss Wilson, it's in the middle of the night now, my mum will call you back later in the morning when she wakes up. Can you please not disturb us again in the middle of the night with your phone call. We really need to sleep,'' I said.
''Well, see if I care,'' she said then the line went dead.