Pump new out of box, set up to charge - DOES NOT WORK

I am so disappointed. I needed to replace a pump in a fountain that i 3 tiers with internal wiring. When i bought a pump that was recommended by the fountain company, the electrical plug was too big to go down the center tube of the fountain. I bought this because the adapter is small enough with a long enough cord to work in my fountain. I set it up and it did not work... I turned it on and off --- did not work. I let it sit out for a full day to charge and still does not work. I have not had time to mess with it any further.... Very disappointed, it should not be this difficult.

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