Restore deleted emails

[#1]

Hello, after an attempted tidy up of the inbox due to a space alert warning from Plusnet on my email storage, I have inadvertently deleted all emails (including from the deleted items folder).  This was done 2 days ago i.e. 16th November.
Would it be possible to recover the deleted emails for one of the email accounts from server backup ?

[#2]

Hi @davsto 

I'm sorry to hear this has happened/

I can see you've got a few mailboxes.

Can you confirm which one you deleted from?

[#3]

Hi Matthew, thanks for the response.
The mailbox in question is 'cath.stokes'

[#4]

Thanks for confirming @davsto 

We've checked and unfortunately, there doesn't appear to be a backup for that particular mailbox.

This means we're not able to restore anything I'm afraid