Another one? We're seeing a
lot of these threads recently... I'm really starting to get suspicious...
To clarify - your post is not the same as the OP, they opened a duplicate account after wrongly understanding what "closed" means, and they were
incredibly fortunate because Betfred had the T&Cs to confiscate the lot, but decided to pay out because there was no other nefarious behaviour.
In your case, you used a third party payment method - and it's going to be bad news... zero chance of getting the winnings, and a fight for your family member to get their deposits back. Additionally, if they suspect foul play, then the transactions could be referred for fraud investigations internally and/or externally (such as the police).
I've flagged for the thread to be split, but in Blue Peter style I can refer to
a similar thread from last year - and it's worth noting the OP of that thread is
still waiting for an outcome 18+ months later.
Otherwise
@mulven has already covered the key points - any substantial financial transaction funded by a third party can smell of money laundering, and businesses are under increasing pressure to deal with those situations as they arise. You will get nothing, your mother
might get deposits back depending on how Betfred view the case with all the information - but expect to jump through a lot of hoops.