The OP is being rather disingenuous here by not telling you all how this payment method (PoLi) works. It basically acts as a man-in-the-middle website for you to make a payment through your bank's internet banking website. You provide your banking username, password and any two-factor credentials to the PoLi website, which then logs in to your bank internet banking website and makes the payment transaction using your credentials.

I have no idea how it lasted this long, to be honest.

The OP is being rather disingenuous here by not telling you all how this payment method (PoLi) works. It basically acts as a man-in-the-middle website for you to sign on to your bank's internet banking website. You provide your banking username, password and any two-factor credentials to the PoLi website, which then logs in to your bank internet banking website and makes the payment transaction using your credentials.

I have no idea how it lasted this long, to be honest.