Your store credit shows are 2 places. One in your profile (click the human icon top right hand corner) and your balance is there at the top right.
If there is any store credit, it will also show in your checkout place.
However if you are signed into Shop Pay, your store credit might not show due to a Shop Pay's limitation (which we hope they will fix one day)
To see your Store credit, you will need to sign out from Shop Pay (click check out as guest) and sign in again using your email and Pin.
Your Store Credit will then be available to apply on the checkout page.
If for any reason, it still won't show, just take note from your profile on your balance, check out from your order as normal and email or add a note to your order on how much you wish to redeem. We will manually refund you the amount and deduct from your store credit for you.