Charged twice for same bill

My payment on file was charged on Dec 31, 2021 for the amount due. I was just charged again for the same amount. There are 2 charges now shown on my bank account for the same amount and my Xfinity account shows a credit as the balance in the amount of one of those charges. I did not initiate or authorize the 2nd charge as I’m on automatic billing. I want the 2nd charge refunded to the payment method used.