Disappointed client

[I am really disappointed by the service I received from Nedbank

In this day 07/10/2021 I was depositing money on an ATM... The money went in then few seconds the was a message that says technical error Then I did not get any receipt.. Immediately I decided to check my bank balance then I saw that money is not reflecting. I immediately called Nedbank to notify them.. Since then I was send from pillar to post.. I called numerous times even visited the brach few time but no one is willing to assist.. Everytime when um at the branch.. They call their call center but at the end no one helps.. They promise to call back but they don't.. Kindly assist to get my money back.. Um desperately in need of that money.. Pls help