How do i restore my phone in recovery mode if I do not have a Mac computer?

You don't need a Mac to put your phone in recovery mode, you can do it with a Windows too. Just connect your iPhone to the computer (with an original USB cable) and depending on the iPhone you have, open iTunes or Finder and put your iPhone in recovery mode (check this article to see how to do it depending on your iPhone: If you can't update or restore your iPhone or iPod touch - Apple Support).

Borrow a Mac computer or go to an Apple Store or Apple Authorized Reseller and see if they will let you use a computer there.