失礼します。
I am extremely obliged to you―overwhelmed with your goodness.
Excuse me a moment.
Pardon me for interrupting you.
I must apologize.
申し訳ないこと
Excuse me, but...
I am terribly sorry but,
Excuse me a minute.
失礼します。
失礼します。
失礼します。
無礼です。
I'm rude.
謝ります。
It has been a long time since I wrote you last.
It has been a long time since I got in touch with you last time.
失礼だ
You're rude.