This payment plan does not affect your credit score and works like this:
A. The unpaid balance of your payment plan is held in reserve on your credit card to ensure payment, but the card is only charged as each installment falls due. This is called pre-authorization.
B. Installment payments will be charged monthly to your credit card. The pre-authorization is then reduced as you make each monthly installment.
Below is a graphic to better your understanding
All you need to be eligible is a VISA, Mastercard or American Express credit card with available balance at least equal to the value of your purchase.
A 3% surcharge is added to your bill