Can any one help me write a compelling complaint letter to Nextel/Sprint for

[pgfpdwife]

horrible customer services? I purchased a brand new phone in July 2006, one month later it just stopped working. Several phone calls later Nextel told me to call Motorola (NYSE: MOT) and they would replace it. Motorola sent me to a Nextel authorized repair deler and they told me I shoudl call Motorola. After the run around the only option the authorized dealer gave me was to pay for the replacement or sign up for some warrenty plan. They gave me a refurbished phone that sucks compared to the 300 one I bought a few month earlier. AUGH!!!!! Help...I cannot seem to get any one to answer me at those companies. What can I do? I have already talked to several managers.