How to deal with the relationship with street offices and property companies?

Since the contract is signed, it is valid. When the property contract was signed, there was no industry Committee. The property company can introduce the street, but it must be approved by the owner and publicized without objection. Now that you have set up an industry committee, if you are not satisfied with the property company and the street, you can complain to the housing and construction department of your district and ask the property company to rectify. You can also hold an interim owners' meeting to discuss the dismissal of the property company. Because the right subject of dismissal and introduction of property companies is the owners' meeting. Specifically, I suggest you complain to the housing construction department first, and then decide how to deal with it according to the complaint results.