Hi,
There is no option offered by paypal in their API for that. However, by default in hikashop, the address of the user is asked during the checkout so that you always have the address of the user.
Do you use a recent version of hikashop ? What was the two amounts (the one in hikashop and the one paid) ? In old versions of hikashop, there could be a rounding different between the price calculated by paypal and the price calculated by hikashop which might result in the payment being refused, so you might want to update...