Question Jbl boombox not charging

Dec 26, 2019
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Hi
Just purchased my jbl boombox 3 days ago (dec.24 evening) but it doesn't charge at all.
I bought it last December 24 evening (6pm)as usual for testing there's a battery .
I've used it until 8:30pm but it's was dropped dead .I try to charge but it wasn't charging until few hours .so I thought won't be enough time so I let it charge overnight hoping it will fully charge the next day but I was so disappointed ☹️.still dropped dead.
Please advice .
What should I do ?
I'm here Singapore.