Pay back my money

Avis has been giving me a run around since 20 March 2021 regarding money that was deducted from my account but when I called to confirm my reservation they said there is no reservation in my name but money was deducted as the booking was done online..Fast forward I called them numerous times even sent my bank statement to prove money was deducted from my account, I was given a lame excuse that their central bank will return the money and that they did deposit the money in my account. it’s over a month now still no money in my account , I have requested for them to send me the proof of payment I have been promised it will be sent since last week, it now a new week still no POP and no money in my account