Entered payment via a debit card.
Got warned I'd need to approve via the app.
Approved by the app.
App shows the payment.
Website stalls...
I notice that my browser has blocked a pop-up window.
Allow the pop-up.
Pop-up fails to load.
Website tells me that NO payment was taken and my vehicle is NOT taxed.
I click continue, it tells me no data was saved and I need to start again.
Meanwhile, I receive an email from the DVLA telling me that payment WAS taken and my vehicle IS taxed.

Am now confused.