The worst customer service I have ever experienced...

The worst customer service I have ever experienced. They seem unable to carry out any agreements they make. I attempted to make a payment directly from both of my banks. They were unable to withdraw the money, although it was in the bank. They insist on a credit card. I agreed to make a payment with a money order, once they sent me a bill in the mail. They have agreed to send said bill on several occasions. I still have not received it. Most of the operators calling me are difficult to understand, and at least one is very rude. The only reason they are getting even one star is because not checking it isn't an option