How to complain that the security guard let him be laid off?

Hello, dear, it's my pleasure to serve you ~? The way to complain about safety is 1. Complain directly to the property management company, either in person or by letter or phone. You can also complain directly to the security management unit (usually the security company). 2. It is best to have specific events in the complaint, the content of the complaint should be clear, and relevant evidence should be kept. 3. Before complaining, it is suggested to look at or understand the performance requirements of some security guards first, so that the complaint will be more targeted at Xing.