My house was fitted with a security door, and neither the developer nor the property knew about it

Agree with the upstairs, if you don't figure it out, there's nothing wrong with you, it's no big deal to smash it directly. At that time, people also gave you a trick, you didn't take it, the reason why people have countermeasures, proves that you are definitely not the first such thing, spend a thousand yuan to install the door, others can't get it away, you don't have any loss, and you get back a house. You can't even find who the other person is, who can you put in charge?!

It is important to get the house back.

The situation is equivalent to your bike, and you don't know who locked it.

If you know the reason and you are at fault, then find the other party to negotiate theoretically and cure the root cause.

If you don't know it, there's nothing wrong with you, it's no big deal to smash it directly, how good it is to earn a set of doors, a thousand yuan.

You have every right, and you can not know anyone.

More than something can be sued! You can sue him for harming someone else's finances! You can also sue him for illegally creating someone else's house! Write everything you can think of! Then sue their company!