Hey lads, So I'm trying to buy 10 boosterpacks through paypal but the thing is, When ever I enter my card details and stuff it just says "You need to have a Paypal Account" Or "You can't use the same card number as another account". What do I do?

Hey lads, So I'm trying to buy 10 boosterpacks through paypal but the thing is, When ever I enter my card details and stuff it just says "You need to have a Paypal Account" Or "You can't use the same card number as another account". What do I do?