To Cancel an Airdrop, you need to:

Step 1: Select Airdrop on the left menu to display Airdrop Event Listing page

Step 2: On Airdrop Listing page, click on an Airdrop Event to view detail 

Step 3: Click on Action button on the top right of View Detail Airdrop Event and choose Cancel Airdrop, Cancel Airdrop pop-up will be presented. If you’re sure to cancel, let’s click on Confirm button

Step 4: Next, you need to confirm your cancellation by signing on MetaMask. After your confirmation process is successful, you need to pay a Gas Fee