LOCK CAME OUT OF DOOR

It's hard to say without looking at it but's it's possible there is an issue with the linkage. It could be worn out causing it to fall apart. A hands-on inspection is needed but take a look at the linkage. If you need to find a shop near you, use this link https://repairpal.com/repair-shops Alex

Since it's impossible to answer your question without a bunch more details - this YouTube video MIGHT help : https://youtu.be/AAiD29mMpaE