What to do when some parts of the screen don't respond on the Kobo Arc?

There are some areas in the screen that don't respond like the upper right and I cannot press some letters in the keyboard making it hard for me to type. I have tried restarting it and even bringing it to the center that it should be brought to to have it fixed (kobo store) but they only deleted my apps exept my books. That's okay for me but now I just have a dysfunctional Kobo Arc.

Have your screen checked, it may have worn out or got damaged. Was the device ever dropped?

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