A phone call

Tanya hears her mother yell "pick up the phone Tanya". Knowing it is going to be bad but unble to resist her mother she answers. "Hello" she says in a weak voice. "You will not hang and you will do exactly as I tell you" says a voice Tanya does not recognize. " Tomorrow you will skip school and instead go to the local mall, there you will pick up a pay phone and call this number for further instructions" . "Do you understand Tanya" . With only one answer Tanya says "Yes"