A green bar appeared on my phone

That means the display has failed.

In countries with Apple Support, a visit to your Apple dealer would likely result in them replacing your phone.

Unfortunately, since you live in a country without support, you would need to get someone that lives in the country where your phone was purchased to take it in for service for you.

Where is this “green bar?”

Yes is sound like a hardware problem, you should go ask a apple store

maybe the charging cable, the batteries or just the screen. Maybe you should ask a apple store and or order a new screen

Nice day to everyone

Sounds like a display failure.

Take it in to your local Apple Store for assessment.

Genius Bar Reservation and Apple Support Options - Apple