Water connection will not shut off

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Brand:Samsung
Model Number:rs25j50
Main Symptom: Icemaker water won’t shut off
What happens & when:

Error Code (if any):
Parts or tests already tried:
Photos / video link:

Turn the water off at the back of the refrigerator until you can determine the problem. Either the water valve is stuck open or the icemaker has failed in a fill position

I just purchased and set up a Samsung side by side and the water won’t shut off. The water is coming from a silicon covered tube located in the ceiling above the ice maker. I am guessing that there is some overflow switch that is not working. Any suggestions on how to fix it?

Done. Now what do I do to fix it?