Greg O responds:

When I dropped AOL They kept billing me, even after two phone calls to
disconnect. My credit card company seemed reluctant to help to, so I closed
the credit card account!

But that seems to be a characteristic of these companies. I've dropped 3 that
were unsuitable and in all cases have had to have the credit card company
refuse payment several times before the message got through. They all make it
as hard as possible for you to find the information that lets you quit, then
they keep billing after you quit.

Charlie Self
"Bore, n.: A person who talks when you wish him to listen." Ambrose Bierce, The
Devil's Dictionary