Jesus, stop. You probably only removed the boot entry, happened to me before. Download Windows ISO, put it on a pendrive, boot into it and navigate to the terminal. Then look up a guide on how to restore the boot entry, should be just couple of simple commands and you're done.
If you are too lazy, at least boot into Linux, mount the Windows drive and back up your stuff.
Honestly I just watched some Indian YouTube video, I recognize some of the commands, so it's probably it.