Negligence with Our Monies

Money from my account was used **********ly to pay for international transaction on the 11 November 2021. I notified the bank on the 12 November 2021, to this date nothing has happened. Each time i call the bank they keep telling me that they are still investigating and waiting for the merchant to respond. If I ask for the report they don't want to give me a report and they never update me I am the one calling them all the time. They promise to call me back but never do.