Can I sue the company for misleading me about the extra charges and what's included and not in the service?

Well, it all went down when I called to say we were moving. The marketer asked if I used my home phone I said no so he asked if we wanted to upgrade to home security instead of phone and it would only cost a few dollars more. Well I agreed and he set up an app. Well our time stamp came and went and when I called to ask where they were it was, "you don't have an appointment today or it says you canceled it" I was outraged I had it all set up and no one called and they said this. Well I got credited and a new app. It happened another two times. Finally we had our service then the bill came in $220.45. We were being charged for installation fees from home security and Comcast we were never notified about any fees so I argued it. I was also being charged for a window sensor that their tech had installed under the impression it is included. They insisted that I was told. Said I was lying. I said I'm not stupid if I was told about these fees I wouldn't have agreed to anything. So they said they would listen to the records and would call me back. I waited a week, called back BC I had not received a call yet. After 3 1/2 hours playing ring a round with who I'm supposed to talk to, I get told a supervisor will call me back and to return the extra sensor to our local Comcast. I waited two weeks still no supervisor. We went to our local office. I tried to return the sensor they REFUSED. I don't have the money to pay all these extra fees and for equipment I never knew I would pay extra for. I'm on disability. I got a phone call from them thinking it was a supervisor nope they wanted to disconnect our services. Even though I had already made a payment for what our bill should have been. They said I have to pay what they say even if I can't afford to. I had a panic attack and went to the ER. I called them back and was told they would send someone to pick it up. No one came, twice I called again and they said to go back in. Still wouldn't take the part. I'm back at square one & had another attack on the way home. Help please.