I have a battery problem. What can I do to fix it? I am in Iraq. There is no branch of Apple Company here

Your battery needs to be replaced. It should be replaced after it has reached 80%. You will have to try to find someone that can replace the battery. I'm sorry but Apple does not have service in your country.

This is not a chat service, and is not a way to communicate directly with Apple; it is a user-to-user technical support forum. If you have a question or issue that you think another user can help you with please describe it in as much detail as you can and a user who sees your request and thinks they can help will answer, but that might not be immediate; it could be hours later. Here is some advice on how to do that effectively→Writing an effective Apple Support Communities post.

To get some help here, you are going to have to clearly describe your problem. Make sure you provide details.