Or you can threaten to report them to the relevant consumer body in your country. I did this after arguing with one of their sales people about cancelling a sub

Or you can threaten to report them to the relevant consumer body in your country. I did this after arguing with one of their sales people about cancelling a subscription for half an hour and they immediately relented. Just speculating, but i suspect they know what they're doing is dodgy and want to avoid as much scrutiny as possible from any regulatory bodies so their support script says to cancel if the customer mentions reporting them.