Bank froze my CHF 10,000 from Binance P2P, buyer now claims account was hacked. What happens next in Switzerland?

Hello everybody,

I did a Binance P2P commerce for about CHF 10,000. Before releasing crypto, I adopted regular steps:
Verified the customer’s identify matched the Binance account
Requested if the bank account was in his identify → he confirmed yes
Cost came from that same identify/account from his bank (Valiant) to mine (PostFinance).
No third-party directions or off-platform payments.
Launched crypto solely after receiving the bank transfer and confirmed identify match.

10 days later the equal amount was frozen in my account and I immediately raised a Binance P2P attraction.
Through the attraction process, he wrote the following assertion :

"Bonjour, Mon compte a été utilisé par une tierce personne depuis longtemps, qui a pris accès à mon compte. Je m'en suis rendu compte uniquement grâce cette transaction depuis mon compte Valiant pour ce transfert. Je n'ai pas donné l'ordre de transfert, je me suis fait arnaquer et une plainte a été déposée aujourd'hui. Je n'ai jamais eu accès
aux cryptomonnaies de ce deal. Point necessary, ce n'est pas moi qui ai initialisé le litige de cette transaction, mais le hacker!"

Which means that : The customer claims his financial institution/Binance account was hacked
He says another person initiated actions and he didn’t authorize the switch
Binance has stored the dispute open
My financial institution has now frozen the CHF 10,000 incoming switch for compliance evaluate.

Now I’m curious : might someone hack someone else’s Binance account as well as their checking account, provoke a P2P order, withdraw the released crypto?

What happens in this type of state of affairs in Switzerland?