Any previous credits on the Account will be used BEFORE any Gift Card credit. If the charges due at Enrollment exceed any previous credits on your Account, the Gift Card balance will be applied after those credits are applied.
If the enrollment charges do not exceed any previous Account credits, the Gift Card balance will not be used; only the credits will be used. After Account credits and Gift Card balances are used, any remaining balance will need to be paid by ACH (electronic check) or credit/debit card.