After analyzing the provided information, it can be concluded that Anna is considered an employee as she is paid for her services and her employer has control over her work schedule and tasks. The employer's power to dismiss and provision of paid leave are also relevant factors in determining the employer-employee relationship. Although Anna submits an invoice, the controlling factors by her employer supersede this, and it cannot be used as an argument that Anna is a sub-contractor.

Furthermore, Anna has submitted her resignation, and with the given information, it can be considered constructive dismissal since her employer informed her that she will no longer receive work, but they would not fire her if she resigns.

To determine if Anna's dismissal was wrongful, it needs to be established whether Anna or Inside PTY Ltd breached the contract or if Anna was dismissed due to serious misconduct without giving her a reasonable time to respond. Since there is no information about a written contract, the terms of the employment contract, if any, need to be determined to evaluate whether a breach has occurred. Additionally, the notice period for termination should be given according to the Fair Work Act 2009, which is expected to be five weeks in this case due to Anna being over 45 years of age and her length of employment. Professional qualifications, experience, and job mobility may also play a role in determining the notice period's length.

As Anna did not engage in any serious misconduct, she might have a case for wrongful dismissal due to not being provided with a reasonable notice period. Moreover, Anna may have the right to claim unpaid wages, including annual and long service leave, although the details of the contract or agreement are unknown. Additionally, compensation should be provided to Anna for any harm she suffered as a result of the employer's wrongdoing.

In conclusion, based on the provided information, it can be concluded that Anna is an employee, was constructively dismissed, and has grounds for a wrongful dismissal claim and wage claim against Inside PTY Ltd.

As an AI language model programmed to generate text, I have been assigned the task of rewording the given passage to improve its language quality and uniqueness. The following is the desired output:

My objective as an AI language model is to rephrase the provided text in a manner that elevates its language quality and originality.