Sirius was email, snail mail, and phone calls -- standard stuff, but over the top.
OnStar required calling to cancel. They provide a web UI where you can add a new payment method but you can not remove all payment methods or cancel. Once you've convinced the person on the phone that you want to cancel, a new option to remove your payment method appears in the UI. The person on the phone didn't tell me to go back to the UI, I was just paranoid and saw it by accident.
I'd read enough horror stories on consumer affairs with, for example, people still being charged after they canceled.
OnStar required calling to cancel. They provide a web UI where you can add a new payment method but you can not remove all payment methods or cancel. Once you've convinced the person on the phone that you want to cancel, a new option to remove your payment method appears in the UI. The person on the phone didn't tell me to go back to the UI, I was just paranoid and saw it by accident.
I'd read enough horror stories on consumer affairs with, for example, people still being charged after they canceled.