Forget the credit card statement for the moment - what matters from the point of view of your accounts (and in particular your VAT) is the actual receipts or invoices that your suppliers gave you for each thing you purchased.
In order to be able to reclaim VAT on something you must hold a valid VAT invoice of some sort from the supplier telling you the exact net and VAT amounts you have been charged (which may not be a formal invoice, it might be a VAT receipt from a petrol station or something like that, the point is it must show the net/VAT breakdown). If you have a receipt that doesn’t itemise the VAT then you can’t claim back the VAT on that but you can still treat it as a business expense (with the gross total in the “net” column and no VAT).
So for each invoice/receipt you would create a “purchase” in QuickFile with the net and VAT amounts as specified by the supplier on their invoice, and ideally attach a scan or electronic copy of the invoice to the purchase record via the Receipt Hub. If you paid for it by credit card then you mark the purchase as paid from the credit card account.
When you get the credit card bill at the end of the month you can use that as a cross-check against QuickFile’s view of the credit card “bank account”, and if there’s anything on the CC bill that isn’t recorded in QuickFile it means you’ve probably lost a receipt somewhere… The actual act of paying the credit card bill is just a bank transfer from your current account to the credit card account.