I am grateful to you for your sympathy.
Please excuse me for my rudeness.
the act of humbly expressing gratitude
衷心からお悔やみ申し上げます.
I wish you would look over my composition.
心よりお詫び申し上げます。
I beg many pardons―a thousand pardons.
I must apologize.
深くお詫び申し上げます。
申し訳ないこと
I beg many pardons―a thousand pardons.