I have been talking with customer service every single month since January. I closed my account last January and they keeping send me bills in relation with the account. I have all the screen shots of the conversation with Sprint and in all the conversations they apologized and promised to me to solve the problems and nothing happen. This month I received a letter from collection in relation with the debt, I tried to call them and the number provided for the collection company does not exist. Of course I will not pay a debt rhat I not have and if they continue I will sue the company. This is unacceptable. This is the worst company in the US.