Charter Communications Over charged since I've had their sevices, Internet

I have had charter for about 6 months now. When I first signed up I had just internet for what was supposed to be $29.99 a month. My first bill was $64. I knew is would be a little higher the first month because of instillation fees.

But as the months went on my bill went higher and higher. Then 2 months ago they had to send a tech  to my house because my modem stopped working. They charged me $45 for that, and I had to call and get those charges taken off. They said they took it off my bill but it was still on there.

Then I ordered cable with them this past month. I was told my bill was going to be $185 for the first month, turns out it was $301. Needless to say I am cancelling with them. My bill was NEVER what is was advertised as.