iPhone 5S touch screen issues

Hi! I have a lot of issues with the touch screen of my iPhone 5S! the touch screen have areas without response! but not always the sames areas!

each picture represent the different areas without response in the touch screen! are not the same in some cases!

I´m writing from Argentina, so we don´t have apple store here to go to replace the cellphone or repair it! I could buy the whole touch screen and replace it by my self, but I don´t know if is only a problem with the touch screen or maybe an issue with the battery or other hardware components!

Sorry for my English! thank you in advance!