I subscribed to a streaming service that subsequently put up their price. At the time of the price increase, they required me to accept the new price. The streaming did not work without this acceptance.
I did not accept the new price and the streaming service no longer worked. However, they kept billing my credit card at the old rate.
I did not realize this for some time and when I did, I disputed the charge for that month, which was quickly refunded. Then they charged me the next month. Because they had forced me to take action again, I demanded refunds going back quite a long way. All of these refunds were credited to my account.
I was unable to log in to cancel. I was unable to get any response from their customer service, until I finally realized that, at some point in time, they had broken support for "plus-addressing".
But why did they keep charging my account? I wonder how many other people they are still charging, but not providing the service.
A couple of decades ago, I experienced something similar: I had been paying a monthly amount for dial-up Internet. About a year after the service shut down, I was still being charged. In this case, it was in the UK, where there are supposed to be protections against bad "direct debits", but the bank basically told me to take a hike when I complained. It wasn't so much money that I could be bothered to argue.