Cox Cable In the middle of my contract, my bill went up $30 a month, 25% Atlanta Georgia

I have 150mbps internet and no movie channels.  My bill went up $30 a month.  They will only say that it is in the contract.  I can cancel my service, but there are a bunch of cancellation fees.  Also, I live in an apartment building, so if I cancel, I have no internet, and I work from home.  I could do just the internet, but without a bundle the internet alone FOR 150MBPS is $88, plus the $15 modem rental.  So even if I could go purchase my own modem, for $150, I would still have to pay $88 for terrible speeds and pay the cancellation fees for cancelling the cable.  

I did know that my bill was going up in the middle of my contract, but when I called and set up the service last year, the young lady couldn't tell me how much, and she just said not to worry about it, to just call back when the bill went up and get it adjusted back down.  I have called back, twice, and they tell me there is nothing I can do.  So they won't work with me.  The fact that I HAVE to use them is how they are able to screw over their clients so badly.  If I had any choice in the matter I would go to another company.