Sorry to say this, but I guess there isn't any way to do so as far as I know.
What you can do now, is to simply add your gmailGmail account to sync at-least your old contacts.
If your sync is not working properly, then do the followingfollowing:
- Check that Internet connection is working properly on your phone, by re-settingresetting your mobile internet connection.
- If above solution isn't working then try re-startingrestarting your phone after removing your SIM card for at-least 10 minutes.
- If the problem still persists then please contact your service centre for further help.