Bests & Worsts Reviews from Amazon

I bought this calculator a month and ago and it was working perfectly until today. 2/26/2019 I was adding my tax information and out of no where it shut off, i switched the battery and it would only stay on if i help the on button, but as soon as I took my finger off the calculator turned off. I'm not able to input numbers or see anything, the screen when blank. I would advise you to save your money, unfortunately i cant get my refund. :(