The payment was transferred to my bank account in December.
I confirmed that there was payment made into my bank account in December.
ご質問ありがとうございます。
① "The payment was transferred to my bank account in December."=「12月に、支払いは私の銀行口座にされていました。」
② "I confirmed that there was payment made into my bank account in December."=「12月に私の銀行口座に支払いがされていたことを確認しました。」
ご参考に。