Didn't jump start my battery, just started smoking

I charged this product and put it in my vehicle so it was ready when I needed it. I went to use it this morning and when I hooked it up and pressed boost, the device started smoking and got really hot. So now the device doesn't work and I couldn't start my car. ** 2 weeks ago I was told by the seller that they would send me a new one, yet I have received nothing. Save your money, buy another brand**

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