IPhone 5 troubleshooting

My iPhone 5 keeps shutting off unexpectedly and everytime i text it texts by itself and scrolls through emojis. I factory resetted it, but still seemed to not work.

I also held down the power and home button for the refresh

Everything on he screen huge. One font takes up half the screen. Can't call put or turn it off.

Everything on my iphone 5 is huge larger than the screen.Can't call or turn it off.

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