Stuck on AT&T logo after unssuccessful root, not sure if bricked.

So I tried to root my Samsung Galaxt S6 edge plus, after so many problems errupted and trying different methods, I tried unrooting it and even a factory reset.
Now it boots and stays stuck on the AT&T logo animation screen with the blue light staying on, I've searched EVERYWHERE and I cannot find a solution to this.
Can anyone help me please? :(

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