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Just to confirm, did you mean you deleted your Form Submissions without making any backups and you're asking how to get them through Excel?
If that's the case, then sadly, that won't be possible. You won't get the submission data exported to Excel since they don't exist anymore. As a gentle reminder, when you deleted the submission, you should have seen a warning before proceeding:
When deleting submissions individually, you will see this warning message (see screenshot above). Please note that deleting submission data is irreversible and will permanently remove it in our servers, including the file uploads on them.
We also mentioned this on our guide on How-to-Delete-Form-Submission-Data
On the other hand, if you all you're asking about is how to export your Submissions to Excel then this guide would be a big help: How-to-Export-Form-Data-to-Excel
In case we misunderstood your question, just get back to us with a bit more info and a clearer description of what you're trying to do so we can better assist you.