Members of a company become members when their names are recorded in the register of members - that's what the defining point is. If they've been issued shares (even if they're not yet paid for), then the issue needs to be recorded.
Your issue is more about corporate governance. The company's director is the one who runs the company, but they are there are the collective will of the shareholders. You need to call a general meeting of all the shareholders and 'hash out' the issue, being aware that most company constitutions require that a member's shares be fully paid up before they can vote. If you're not satisfied with the situation, resign as a director subject to a new director being appointed. The shareholders will be forced to appoint a new one. Since you're a sole director, I would not suggest resigning without ensuring another director is appointed, as this may be considered a breach of your director's requirements to ensure compliance with the Act.