How to solve the quality problem of the house just after its shelf life?

Commercial housing with general quality problems, after the shelf life, developers no longer bear the responsibility for maintenance. However, when owners buy houses, they all pay the maintenance fund. Belong to the scope of maintenance, after verification by the property management department, apply to the housing management department, which is responsible for maintenance. If it is not within the scope of maintenance, please repair it yourself. Hope to adopt, thank you!