After the paid period ends, your account moves to the Free plan; it is not deleted. A team plan is cancelled by the person who manages billing for the team. During HawkOpen Intro, cancelling stops the move to the Business subscription chosen at the start.
HawkOpen does not give voluntary refunds for a period that has already started, except where mandatory law or a withdrawal right applies. Consumer contracts also have a separate 14-day withdrawal right, wherever the consumer is billed.