Can't reach google on my android galaxy mini 3

[AC Question]

And lost my contacts how can I restore all of them?

 

[Rukbat]

That depends on what "Can't reach google" means. Can't get to the internet? Can't get to google.com? Can't log in?

You need to go to Google Contacts (you can use any computer, tablet or phone) just to check to see if your contacts are there. If not (only contacts listed [during editing one] as a Google contact will get backed up), they're gone forever. See the Contacts section of Backing up an Android Device to know what to do in the future. (Always enter contacts as Google contacts.)

Unless you backed them up some other way, Google Contacts is the only way to restore them - if they were backed up to Google Contacts.