Hi @vaishakhi, sorry that you had this problem. I understand it’s frustrating when things go wrong unexpectedly, but I was able to recover a saved draft of your form. The specific version that I restored is the one before the language was changed from “Hindi” to “English”, as it was the last non-corrupted asset.
As to what had happened, since we couldn’t reproduce it I think it’s safe to say there was a browser or network glitch (not from our end).
I took the liberty of uploading the recovered draft to the owner’s account and gave your account the “Manage Asset” permission it had before. In case you want it, here’s the recovered XLSForm:
Recovered draft of SEWA Sarthak Study - May 2021.xlsx (17.8 KB)
So to answer your original question and the topic of this thread: yes, there is a way to restore an older version of an undeployed form–though not through the UI. It’s done through our API which is outlined in this form post (asking the same question): Recover draft version of form. We should try to reference this post next time someone asks this 
