First, navigate to “MY DASHBOARD”:
At the bottom of this page, you will be able to view the purchasable APY boosts for your team – including Arms boosts, and either the Sacred Relic pack, or the Super Sacred Relic pack. As you can see, the price of each of these packs will be listed. Click on your desired boost, and a popup will open:
Then, click to “CANCEL” or “CONFIRM” the purchase.