How i can restore my deleted contacts

That depends on how and why they were deleted. Contacts are not stored on your iPhone, they sync to one or more email accounts. If you delete an email account that is hosting your contacts they will disappear from your phone. Go to Settings/Contacts/Accounts to see which accounts contain the master copy of your contacts.

• If it is iCloud, then see this→iCloud: Restore contacts, calendars, and more in iCloud Settings
• If it is any other type of email account (e.g, AOL, Yahoo, gmail, hotmail, Outlook) then you need to use whatever tools your email provider offers for recovering contacts
• You may also just not be viewing the contact “groups” in the Contacts app - open the app and tap Groups in the upper left corner and make sure all groups are checked.