UNAUTHORIZE CHARGES

I cancelled my dish network service before the contract date, which obviously means that I would be subject to early cancellation fee. I gave the representative the address where I would like to receive the box (in order to return the equipment) and final bill.
Days later I never received the box, I then took the time to call them to figure out why I never received the box, apparently, they entered the wrong address on their system. I asked the representative to correct the address so I can receive the box, what was disturbing to me was that the representative was so incompetent that had I not ask what address they had on the system as the mailing address for the final bill/notice then it would have remained the same wrong address.
Approximately a week later I received the box, which I immediately returned with the equipment. Three days later I called to verify that they received the equipment and a final bill was mailed out (the representative did indicate that once they receive the equipment I would receive a final bill/notice). At the time of I called they did not receive the equipment, two days later my debit card was charged.... My question is why? I did everything I was suppose to do, unlike the incompetent representative to provide customers with sound information.
I am not disputing that I owe dish network. From my experience with early termination fees, I receive a bill then I make a payment. This is not what occured with dish network. The representative I spoke to regarding the unauthorized charge, later inform me that they received the equipment a day after I called to verify and thats not it, when I asked about the final bill she said it was mailed out (guess to what address, the wrong address that they had on their system that I asked the representative to correct).
Now not only that I never received a final bill, even if the bill was sent out on the same day they received the equipment it was impossible for me to receive the bill because it was over the weekend. When I explained this to the supervisor, he said that they are not obligated to send me a physical bill. Really? I did end up speaking with Miss S. Lopez the "executive" (above the supervisor), whom I thought was more incompetent than the first representative. She was indignat and unwilling to listen.
The biggest kicker was that I stayed 50 mins on the phone with dish network and got nowhere, I then called my bank to dispute the charges (as it was pending) and the bank representative informed me that is was charged 20 mins ago (which means during the time dish network had me on hold, they charged my card).