I mistakenly transfer 50k from first bamk my accout to access bank to unknown account due to typographical error and all my effort to get my money was not fruitful.
What else can I do please

let's wait for the elders to comment

It's not possible to transfer money to an unknown account without the person's name displaying. Didn't you confirm the name

Do u use ATM, online or offline transact? Cuz the name of the receiver should be displayed in the first place. Though some ATMs no dey display names sometimes.

Go to your bank and file a formal complaint(s). The account can still be traced and your money refunded buh it's a hell of work and stress sha.