New Customer - not getting promo price as promised

I am a new customer to the Gainesville (352 area code) area with Cox. Sadly, they have not honored their promotional price after the first month.  Although I got the first month for free (with the exception of installation and startup fees), which I appreciate, my bill went from the promo price of about $100/mo. to $160/mo.  I have not gained an increase in internet speed, more channels, or added a DVR.  I am a student and have loans out while I'm going to school, there is no way I can afford an increase like this - especially after I signed up online for a promotional price which has not been honored.  I am debating dropping TV completely for a streaming service like Netflix, since the price increase seems to be mostly on that end, and I don't watch 90% of the channels given.  A $60 increase is ridiculous, especially after less than 3 months.  I'm not the type to get on the phone and yell at customer service, but an increase of that magnitude has me seeing red.