I can't find my repair ID and case iPhone11

Have you read -> Related Article -> How to find your Case or Repair ID ?

• To find your Case or Repair ID for support, service, or repairs, sign into My Support with the same Apple ID that you used to start your support, service, or repair, then look under the Recent Activity section. 
• For service and repair, you can also find your Repair ID in the confirmation email that you receive from Apple. 

Have you sign into My Support with the same Apple ID . . . .?

Have you contact Apple Support, request service online, or take your product to an Apple Store or Apple Authorized Service Provider for repair?

Call Apple in your region see: Contact Apple for support and service

Contact Apple for support and service - Apple Support

Contact Apple Support -> Get Support (apple.com)