Should you receive an error message (as shown below), it is likely that the promo code you’ve added is either:
An invalid code (i.e. the code does not exist)
Fully redeemed
Expired
Should you receive an error message (as shown below), it is likely that the promo code you’ve added is either:
An invalid code (i.e. the code does not exist)
Fully redeemed
Expired