Kindly refer to the guides below for League of Legends RP Card (KR) redemption steps:
Step 1: Click on the 'Store' button.
Step 2: Click on the 'Purchase RP' button.
Step 3: Choose a denomination that matches the card you purchased in SEAGM.
Step 4: Select the highlighted box as the top-up method.
Step 5: Agree to the term of use > click 'Confirm'.
Step 6: Key in the 18 digits pin number > click 'Next'.
Step 7: Double-check the top-up amount > click 'Next'.
You have completed the redemption.