Terrible cancellation process

On the line trying to speak to someone at billing (again), while no one responds to to whatsapp line and it's been about an hour now since I sent my first message. This is exactly why I'd like to cancel my account -very bad service. All I'd like to do is click a button that says 'unsubscribe', not waste time, data and airtime trying to get through to an agent to process it for me.