These screencaps posted by Reddit user Zero_Gravity416 are a fine demonstration of how a simple wrong number can scar a child's mind for life. Why this kid doesn't have her mother's number pre-programmed in her phone remains unclear (The kid was using a friend's phone? The mother is a low-level drug dealer who must rely on disposable burner phones for all contact?). What is clear is that by the end of this conversation the kid won't make this mistake again, as she'll probably be too disturbed to ever send another text message in her life.
Sources: Redditor Zero_Gravity416