Is it illegal for a property company to change locks and move items in an empty house without authorization?

Now there are two different legal relationships, so:

First, the company that signed the contract before your company ran away, your company can sue its running company to safeguard its rights and interests;

Second, "now the new property management company is chasing us for money, and we won't be allowed to take things if we don't give money." Now we've changed the lock and moved the things. Is this illegal? " To be sure, this kind of behavior is illegal, and you can also sue the new property company with evidence;

Third, the new property management company has come to serve the owners, and the owners should pay the property service fees on time. If not, the new property company can sue the owners who do not pay.