Sprint PCS Primary Phone Line Scam $4,000 Bill! SprintPCS Nationwide

I had 2 phone lines with Sprint PCS sharing a Unlimited $150 a month plan. When I ported one of the lines out they began to charge the other line $0.40 a minute, therefull after one month reaching about $3,500. They did not bother to call me to let me know of this situation. They claim that it was my responsibility to change the plan. They hide behind this priary line buisness. How can they let a bill that is normally $150 a month run up to over $3,000 and not call to confirm what is going on. After spending hours on the phone with them they will not help me out. They expect me to pay a bill which is now close to $4,900 because they have not yet terminated the line an are now chargeing me about $100 a month until I pay this ridiculous balance.

R
Passaic, New Jersey
U.S.A.