<human>: I signed up for internet services for $19.99/month for the first six months of service with Comcast on their website.  When I talked to the customer service rep on the phone to try to set up an installation (which I did know was going to add an additional cost, and I had no problem with that), they said that I couldn't sign up for the $19.99/month, I had to sign up for the $29.99/month for the first six months promotion.  I agreed to that, had my internet installed, went on my merry way with internet that didn't work.  I tried to call them to have someone come fix it, and they said it was my computer (it's not).  That's not my issue, even though they were very unhelpful.

My issue is this: now I'm stuck with a bill for internet at $62.95/month, that I never agreed to, that I can't afford, and when I called customer service they said they had 'no record on my account of the $29.99/month promotion'.  Basically, I've been screwed.  I'm waiting for a 'supervisor' to call me back, because I want to now cancel my service.  Is there anything I can do to make my bill be what it was actually SUPPOSED to be?

Can you give me the gist of the text in a nutshell?
<bot>: Comcast is trying to charge me $62.95/month for a service they said was $29.99/month.  What can I say to them to make them change it back?