Xcel Billing Catastrophe

So I have to start by saying, this problem originated from my apartment complex providing me with the wrong address on my lease when I moved in. HOWEVER, I called Xcel right away to get the address situation fixed so I could have power at my new apartment and be charged appropriately....so I thought. I moved in June 12th, it's now October 5th. I have repeatedly called Xcel for months now trying to get the other apartment I am NOT living in taken off of my account, but to no avail. They keep saying the request is put in. What does that even meaaaannn? A request? Is that not a simple task to just remove that apartment from my account and only charge me for the correct apartment? As I digress, my account still shows almost $900, for two apartments and not even any of my past payments are shown as being used. It's so frustrating. I just want to pay my bill and keep it current so it doesn't ruin my credit. I'm over it.