I mistakenly credited funds to someone else's card

You can. You need to apply to the court with a statement of claim "On recovery of unjustly acquired funds".

But for this it is necessary to find out who exactly to file a lawsuit against, so first you need to apply to the court with a statement "On provision of evidence before filing a lawsuit", with the aim of disclosing by the bank information that contains banking secrets, regarding a natural person - a client the bank in whose name the account was opened, to which you mistakenly transferred funds.