How to write professional emails in English
I apologize for emailing again, but I have not received a reply to my email beneath. I will appreciate hearing from you. Please let me know if you require more time.
I have not heard from you to my email beneath. Your reply will be greatly appreciated
These both look to me like you are politely instructing the other party to do something.
They're polite emails, but they're still an instruction from someone that the other party doesn't report to.
Personally, I don't like it when someone I don't report to tries to tell me that the thing they need is more important than everything else I'm doing.
Their thing is not more important - I have my own set of priorities, that aren't based on the same drivers as the those of the person who presumes that they can tell me to drop everything to help them.
It's possible that the people you're talking to feel the same way.
Instead, you could rephrase these as requests, acknowledging that the person you're asking for help isn't obligated to provide it, and perhaps including your motivation for needing a response.
I apologize for emailing again, but I have not received a reply to my email beneath.
We're currently preparing a report for the CEO, and would really appreciate it if you could help us please.
We have a deadline of the 15th to complete this, so your assistance would be great. Thanks in advance.
Hi Jane, I have not heard from you regarding my email beneath. I know you're busy, and I just wanted to check that it hasn't slipped through the cracks.
Please let me know if you need any more information from me.