Poor service at its best

My name is Ann I deposited the amount of R3000 on the 15th April 2023 using Nedbank ATM unfortunately the ATM retained my money on the deposit slip wrote transaction cancelled the reason for the deposit it's for my business which I was depositing to Flash Mobile Vending I phoned nedbank immediately I spoke to the lady by the name of Ashlin she said I must call on my Monday as she's going to lodge a complain and gave me reference number so that when I call I must refer to that reference when I phone on Monday they said they are still investigating on Tuesday 12H12 I received an SMS from Nedbank saying (Your ATM query reference number*** has been approved and the funds will appear in your account within two working days) I was excited that at least finally something is happening two days passed nothing in my account when I check on my machine nothing till today I called them again on Friday I spoke to Langelihle asking him to email proof of deposit he said I must query with the reference number that was sent via SMS. I called Vuyi The Flash representative explain it to her what's happening she said she'll speak with their finance department which she did and they asked for proof of deposit she send the SMS I sent to her and they said they need evidence because SMS is not enough to proof that they deposited into their account I called Nedbank today again i spoke to Zininzi she told me the only proof is the SMS so I'm stuck between Nedbank and Flash. My wish is for Nedbank to proof that they deposited money into Flash Mobile vending using my reference number that's all I ask unfortunately no one is willing to help me I'm very disappointed with Nedbank the way they are handling this matter I expected a good service from them as they are one of the big banks in South Africa but I was lying to myself and I will never ever use Nedbank ATM again in my life