Bitpanda doesn't have any responsibility, because they are obligated by AML laws to send the funds back if the transaction is suspicious.
Of course they have a responsability there.
BUT BIG CHANGE TODAY, i finally got credited, Bitpanda did the job and refunded me after a week. THAT'S A HUGE GREEN FLAG for them.
GGWP Bitpanda !
I don't know why Bitpanda sent the funds back, but I they did it because of money laundering suspicion, they don't have any responsibility.