the refund option in paypal is a littlebit of a worry if you have never used it before.

it just says 'refund this payment' or something close to that and leaves the first timer thinking 'if i press this will it automatically refund the whole payment?'

but no, it takes you to a new page with an area to put in the amount you wish to refund.

once your happy with the amount you have put in you then press the refund button.