Poor customer service

I am so mad at home-connect and I swear this is my last month with them! For the second time, they are telling me that I owe two months, yet I have been connected for those two months. I argued with their insulting agent about the matter because I was trying to tell her that I would never owe that much because I use the internet and if I don't pay, I get disconnected, then why did they not disconnect me in those months they claim I own? She asked me to send proof of payment and I did. The next day I got an email apologizing for the system error and that they will allocate the funds. What is that? How do you accuse a customer of not paying when you haven't double-checked? Now ,I am disconnected again, for what reason, I don't know and no one has answers. Poor customer service. I am done with them.