I recently had to cancel an ongoing subscription I had with Equifax, which requires you to call by phone. Unbelievably frustrating. I had to dial the service at least 10 times. Each time, the automated responder would make me go through a very slow menu selection process, only to randomly fail to acknowledge either my correct SSN or zipcode or street number, which I entered using a keypad. As a consumer, I've had to enter info via phone keypad for as long as I can remember, and I've never run into a system (not even small local businesses) that was so randomly buggy.
I thought maybe I had the wrong phone number for cancellation. Turns out, when you google "cancel Equifax phone number", there are several phone numbers listed by Equifax itself, on various sections of its "help" pages.
Took me about half an hour to finally reach a human operator. Surprisingly, the cancellation process was quick with her with no haggling. But I imagine the process is so frustrating overall that a good number of people just give up.