I told you I haven't received the document, but I actually did. I'm sorry.
I did say that I hadn't received the document yet, but I had actually received it already. So sorry about that.
この場合、次のような言い方ができますよ。
ーI told you I haven't received the document, but I actually did. I'm sorry.
「その書類を受け取っていないと言いましたが、受け取っていました。すみません」
to received the document「書類を受け取る」
ーI did say that I hadn't received the document yet, but I had actually received it already. So sorry about that.
「まだその書類を受け取っていないと言いましたが、もう受け取っていました。すみません」
ご参考まで！
I told you that I had not received the documents, but it turns out that I actually did.
My apologies for this.
こんにちは。
ご質問ありがとうございます。
"I told you that I had not received the documents,"＝「書類を受け取っていない、と私はあなたに言いました。」
"but it turns out that I actually did."＝「でも、実は受け取っていました。」
"My apologies for this."＝「すみません。」
ご参考になると幸いです。
カナダ 
アメリカ合衆国 
