"I'm sorry this is happening to you."
=> 이런 일을 당하시니 너무 마음이 아파요. (I feel so sad that this is happening to you)
=> 이런 일을 당하시다니 너무 안되셨네요. (It is so awful that this is happening to you)
=> 어떻게 이런 나쁜 일을 당하실 수가 있어요? (How could such a thing ever happen to you?)