Which department should I complain to the owners' committee?

Legal analysis: 1, you can complain to the property management office of the local real estate administration, which is the competent department of the property industry;

2, do a good job before the complaint. Try not to take the form of oral complaints, and try to submit them in writing;

3. Look at the property management agreement signed between you and the property management company before submission. Where the property management company failed to perform its duties, the evidence should be full and complete.

Legal basis: "Regulations on Property Management" Article 48 The real estate administrative departments of local people's governments at or above the county level shall promptly handle the complaints of owners, owners' committees, property users and property service enterprises in property management activities.

Article 56 of the Regulations on Property Management, in violation of the provisions of this Ordinance, if a residential property construction unit fails to select a property service enterprise through bidding or selects a property service enterprise through agreement without approval, the real estate administrative department of the local people's government at or above the county level shall order it to make corrections within a time limit, give it a warning and may concurrently impose a fine of 6,543,800 yuan.