Worst experience ever

Avis has to be the worst when it comes to refunding or anything in general, I have been waiting for them to refund me my deposit but haven't had much luck ever since. The worst part is I returned the vehicle on the 8th of March 2023 and called them on the 14th to which they told me finance had rejected my refund due to incorrect banking details (which they had never advised me of). I have on that day provided my bank statement indicating my banking details but to this day still no help nor feedback has been given to me.