What is the cheapest way of taking payment online for products i offer via the internet?

I sell a product/service (nothing dodgy) but i wish to accept card payments online without the payee obtaining my private name and address details - is this possible? Also what happens if the buyer disputes the card payment with their bank (eg says they didnt make the purchase) after i have sent the goods to get out of paying? ie. as they have purchased online i have no signature as proof of purchase so what protection do i have?

What is a VPN?

VPN is (Virtual Private Network) were first used by companies to enable their employees to securely access internal systems such as email remotely (e.g. from home or while on business trips). Today they are increasingly being used for personal use by individuals to protect their privacy while online in public places (e.g. when using the wi-fi connection in a cafe) or in a country where the internet is censored / blocked (e.g. China, Saudi Arabia…).