My beats are charging really slowly

Hey everyone, I got some new Beats Studio 3.0 for Christmas. I have been charging them constantly for the last 3 days and I’ve just hit 47%

The light indicator shows that they are charging but it is taking forever.

I have tried 2 cables and charging from 2 different computers, 2 different 5W iPhone chargers and a 15W iPad charger with the same result.

has anyone experienced something like this and have any advice?

Thanks!!