"Excuse me. I'm sorry."
Although, if you use "실례합니다" Like in their example, it would make more sense to use "미안합니다". But, yes, you're right.
Although, whenever you have something like this happen, there's the "report" option where you can select that your answer should be accepted. That said, I think the mods are doing this in their free time and so corrections sometimes seem to take forever.