PayPal is an international payment gateway and is secure. You do not need to have an account with Paypal to use it, you can sign in as a guest and use your Credit/debit card to make payment.
It is free to sign up with Paypal.
Why is my Paypal payment being declined?
It's possible that your payment has been stopped by Paypal's internal security system.
To provide a safe online payment service Paypal's internal security system reviews every payment before it's approved. Occasionally, Paypal must stop a payment. This is similar to the way most banks and credit card companies work. When a payment is stopped, it's not a reflection of you or your account activities, but rather they have noticed a pattern associated with higher-than-normal risk.
Here are some things you can do to help improve the chances of successful payments on Paypal: