Unauthorized money's taken out of my account

I tooknout a temporary loan for 30 days, my husband deposited money to me and fnb took it towards the loan!!! Thisnis unauthorized as it stated on the FNB APP 30 DAYS.. therefor the payment should go off end of JANUARY 2026... THEY TOOK THE R800 AND REFUSE TO REVERSE IT.... THIS MONEY WAS FOR SOMEONE ELSE WHONIS SLEEPING ON THE STREETS WOTH A BABY !!! I WANT MY R800 BACK