In the event of a dispute, your first action should always be to refer to the terms of any agreement in place between you and the other party/parties involved.
The subscriber has the ability to decide what level of access an invited user has to the subscription.
If you are an invited user, then your subscriber controls access to the Pi.TEAM subscription. Pi.TEAM is unable to change user access unless it is authorized by the subscriber to do so. If you require the Pi.TEAM subscription to be transferred, you will have to reach a resolution with your subscriber and get them to consent to the transfer of the Pi.TEAM subscription.
Pi.TEAM is not in a position to decide on the legitimacy of either party’s claims in a dispute. If the parties are unable to resolve the dispute between themselves then they may need to resolve the dispute using some form of dispute resolution mechanism, such as mediation or arbitration. If your advisor is a member of a professional body, such as AICPA, then this body can also help you resolve disputes with its members.