I've tried already on Freepay.
It's impossible to be removed from someone's referral list.
If you don't get YOUR account put on hold, the only way for them to not get credited is if THEIR account gets put on hold.
That's hard to do, because Freepay will only put someone's account on hold if they request it (of course) or if they've broken the terms of service.
I wish I could be taken off peoples' lists, but it's not that easy.