It 100% will cause your apple account to get banned.

There was a fraudulent charge on my card once to iTunes, so I got it reversed by the bank, because it was fraud.

This banned my account and I had to go to apple support when months later I discovered my account was banned. They give you one chance.

So yeah, you gotta ask them first if you don’t wanna get banned. But you should basically say, cancel my subscription, please and thank you, I’m not required to use your device to do so if you let me sign up without a device.

I suspect in multiple countries they would have to comply under consumer law, and I know for a fact they would be obligated to on Australia.