My beats headphones won't turn on at all

My beats headphones won't turn on at all
I won beats headphones on Halloween and I've been using them every day since. Today I charged them and went out to lunch and came back, all five lights were on which means the headphones were fully charged I unplugged them from the wall and plugged them into my IPad as usual and all the lights turned off not even one red one turned on. I tried pressing and holding the power button but no lights have turned on AT ALL. Can someone help?

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