What to do if I mistakenly scratched 2 code out of my Apple Gift card?

See the following from If you can't redeem your Apple Gift Card or App Store & iTunes Gift Card - Apple Support

If you can't read the code on the back of your card because it's scratched or damaged, contact Apple Support.

This is primarily a user-to-user support forum; other Apple users like you.

You will need to contact Apple support. Click on the blue words below:

If you can't read the code on the back of your card because it's scratched or damaged, contact Apple Support.