Which department does the property company complain against the law?

Legal analysis: you can complain to the property management office of the local real estate administration.

Legal basis: Regulations on Property Management

Article 47 The rights and obligations of property users in property management activities shall be agreed by the owners and property users, but they shall not violate the relevant provisions of laws, regulations and management regulations.

If the property user violates the provisions of these regulations and the management agreement, the relevant owners shall bear joint and several liability.

Forty-eighth real estate administrative departments of local people's governments at or above the county level shall promptly handle complaints from owners, owners' committees, property users and property service enterprises in property management activities.