Is it useful to call the police without paying the decoration deposit and key?

Try not to call the police, mediate or complain.

It is neither legal nor reasonable for the property company to give the house key without paying the decoration deposit. Because the property company is a service organization, not a management department or law enforcement department, the formulation and adjustment of prices is the responsibility of the government price department, and other departments have no right to formulate regulations without authorization; Any fees charged by the property company must be approved by the price department, otherwise it is illegal. The property company collects the owner's decoration deposit, which is actually "ultra vires law enforcement". Although there are reasons to collect it, it has no right to collect it.