My store have two payment methods, one based on credit card and another bank transfer. If I choose credit card and choose to installments, Magento update subtotal adding taxes.
If I give up to pay with credit card and change to bank transfer (who should't have taxes), the taxes of installments persists. How can I clear installments in this cenary?
I tried to use those events:
But it is not triggered when I change the form of payment. Only when saved.