Knawat allows to use your balance to pay for orders and subscription as follows:
First, to pay subscription:
Check that you have enough balance
Go to upgrade plans page
Press use balance to pay for the subscription
Wait for a while, and check your subscription

Second, to pay for orders:
Check that you have enough balance
Go to accounting page
Choose the invoice that you want to pay
Press pay
Wait for a while, and check your payment
