1. Contact the property management agency: submit the evidence to the property management agency, such as the property management company or the owners' committee. Explain the allegations to employees in detail and ask them to investigate and take appropriate corrective measures.
2. Seek legal aid: Seek legal aid. Consult a professional lawyer to understand the rights and interests and feasible legal channels.
3. Convene the owners' meeting: hold the owners' meeting together with other owners. At the meeting, show evidence to other owners and seek their support and cooperation.