Have you:

- Checked the transaction on a block explorer instead of coinbase? Is it showing as confirmed there?
- Checked the addresses contained in the transaction... is the output address actually one of the ones in your Ledger wallet? Although given that you scanned a QR code, it shouldn't really have gone anywhere else.

It might just be a glitch in the ledger wallet app... have you tried creating a watching wallet in another app like Electrum and see if it detects your coins? If all else fails... try contacting Ledger support.