ATM did not dispense cash after withdrawal was done

Went to a Nedbank ATM to do a withdrawal. Requested amount was selected and after a while an error message pops up. Card was then returned. Received an sms confirming a withdrawal was made. I then contacted Nedbank Contact Centre. I was then given a reference number ***. I was assured that my money will be reversed within 3 to 4 working days. On the 4th working day I again contacted Nedbank for a feedback. I was then told that the initial reference number did not exist. I was then given a new reference number ***. On following up on the new reference I was then told that the reference number was now closed. Are we dealing with a bunch of clowns. I was then given a new reference number ***7. On following up on the new reference number I was again given a another new reference number ***2. So each time you call the contact Centre all they do is create a new reference number. So going around in circles with no end in sight. Staff are clueless. Hope someone from Nedbank responds.