Dena Christoffersen sent more than 300 texts within an eight-hour period every day at school. (9News)

CHEYENNE In one month, a Cheyenne teenager sent 10,000 text messages and received about the same all while her family's plan did not include texting.

That means the family's provider Verizon charged them for each incoming and outgoing text message.

The girl's parents, Gregg and Jaylene Christoffersen, thought texting had been disabled, so one can imagine their surprise when they got the monthly phone bill and it asked for $4,756.25.