Chris asks: "I am a Sprint customer signed up for automatic payments, and over the past week I've found that Sprint has a computer system that does three ridiculously inept things from a programmers standpoint. First, they send a 'Do not send payment...this amount will be charged' bill then a 'Disconnection Imminent' notice for the same amount, within a week of each other. When customer service is called about this, everything appears fine to the customer service rep, and they assure the client that everything is fine. Finally, the computer system shuts down the customer's cell phone for lack of payment, even if the customer has a credit card on file and has given Sprint authorization to use it. What's the worst experience Slashdot users have found with billing systems that don't make any sense?"