Hi J.!
About a year ago I called Comcast to ask them how to go about canceling my services. I explained that I could no longer afford it and I wanted to change to AT&T since they are more affordable. The lady explained it to me and then I asked her to transfer me to customer retention.
After I was transfered I explained the same to them and asked if they could lower my bill and give me the same rates they give the new customers. They did with no problem! I went from paying around $175 back down to $99 for all 3 a month.
Also, take a close look at your bill. Do you have things on there that you do not need? Like the DVR, HBO or other, non-published phone number etc.... Are there things you can take off and not miss? I have saved another $15 a month or so from taking off the DVR since all my shows are on the internet anyhow or on ON Demand for free.
Also, recently I even upgraded our cable since the On Demand went out one night and my daughter wanted to watch something. I called the cable company and got an additional package added that included like 300 more channels for only $5 a month... of course I will need to cancel that after 6 months or call and ask them to keep that rate.
Remember that there is lots of competition out there and most places will do what it takes to keep your business! The worst they can do is say no!
Good luck and blessings to you and yours!