my daughter accidentally deleted all my contacts can i get them back ?

If the advice by FoxFifth didn’t work and if you were including contacts in the backup and she deleted the contacts on the old phone, and then you backed up the old phone and restored that backup to your new phone, the contacts are gone now.

Use a computer internet browser and log into www.icloud.com

Click Account Settings near the top middle of the screen.

Scroll down to the Advanced section and click Restore Contacts.

Also, what to do with your old phone to prevent future similar incidents with other data: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support