以下英文句子怎樣寫呢﹖

Before I was e-mailed to you, about you can end this year, sister or early next year to repay Canadian dollars would give me 500? "but until now have not received any reply, may or may not have please reply to me.

Dear AAA,

I had sent the email to you about your sister's loan payment, would you please repay C$4500 to me by end of this year or by early next year latest.
but I hadn't gotten your reply yet, your prompt reply will be highly appreciated.

Cheers
XXX

XXX,

Before I was e-mailed to you
about your sister can repay Canadian dollarsend $500 this year, or early next year to me ?
"But until now I have not received any reply,
could you please reply to me imediately?

Thank You

I have sent an email to you before, wondering if you could ask your sister to repay 4500 Canadian dollars to me by the end of this year or early next year? But unfortunately I haven't receive any reply so please could you reply me as soon as possible.

I sent you a mail. It's about if your sister can compensate CAD 4500 for me at or before the begining of the next year. But I haven't receive any respond. Please reply to me.