Mediacom repeatedly charged my account while asking for supervisor without my permission Nationwide

 I called to cancel my DVR box back in February... They charged me for canceling the DVR. I was never aware that there was a charge afterwards. The next month they charged me a portion of the bill. The next month I get a bill for double the amount plus new bill... I called customer service & spoke with 5 different people.. One stated there would be a credit after the box is returned. I returned the box the next person stated it's been removed back in February.. I called to speak to someone else these said that they credited my account then he made another adjustment ty account without notifying me & it made my bill higher than what it was supposed to...

I asked for his supervisor, she gets on the phone to tell me that he was supposed to add a code to the account.. I asked why didn't they do that from the start & y I wasn't aware of it...she stated it was something he done that was supposed to have been done... I told her that he should have notified me b4 changing my service without knowing if I wanted it or not.... I told her to just take everything off of my account and lete have what I previously had... She stated that she couldn't... I then told her to cancel my service and she stated that I would have to do it another day... So now there will be additional charges to my account bc she wouldn't cancel my service after the agent added without notice