Please select PayPal at the checkout page & click Complete order button. Then you'll be directed to a page with access to both PayPal and Debit/Credit card payment (for the later option, you don't have to register for PayPal). Then you can complete your order with your credit card.
As following steps:
Step 1. Select PayPal still even if you don't have a PayPal account.
Step 2. Click button "Pay with Debit or Credit Card".
Step 3. Fill in your credit card info and complete your order.