This, he felt, is an unfair practice, as the credit card companies were negligent in informing their customers of the rate hikes and the reason for such hikes.
クレジットカード会社が顧客に率の引き上げとそのような引き上げの理由を知らせるのを怠ったので、これは不当な習慣であると、彼は感じた。