What should I do if the roof leaks and I can't contact the property?

If the responsibility for housing leakage lies with the property, the property department should be consulted first. Because the property department is generally entrusted by the developer to contact the maintenance affairs, the property department (entrusted by the developer) should contact the construction unit for warranty. If the property has no responsibility, you can complain to the superior unit, that is, the housing management department. As long as you master the facts and keep the evidence, basically all your demands can be handled reasonably.