CAUTION: PAYMENT IS REQUIRED AT THE TIME OF BOOKING. THE APPOINTMENT IS NOT ACCEPTED BY THE SYSTEM UNLESS PAYMENT IS RENDERED AT THIS TIME. PLEASE HAVE YOUR CREDIT/DEBIT CARD READY.
If your card is being declined by PayPal with no reasonable cause then you have used the guest checkout option too many times. You must create a PayPal account and attach that credit/debit card to your account.