Subscribe | UPI Odd Newsletter Subscribe CHEYENNE, Wyo., April 8 (UPI) -- A Wyoming father said he took a hammer to his 13-year-old daughter's cell phone after she racked up $4,756.25 in text messaging fees. Gregg and Jaylene Christoffersen said they thought texting was disabled on the phone used by their daughter, Dena, because their plan with Verizon did not include the service, KUSA-TV, Denver, reported Wednesday. Advertisement However, the service provider charged the family for each one of the 10,000 text messages that Dena sent in a single month. Gregg Christoffersen said he smashed the offending phone with a hammer and he and his wife have grounded Dena until the end of the school year. The couple said Verizon has agreed to reduce the bill to a more manageable amount.