Being investigated for their atm default

I went to their bank on Saturday to deposit money on their atm in the branch on charlotte maxeke bloemfontein , so the atm jammed while processing the payment so when I went to enquire about my money they said they need to investigate first whether what im saying is the truth or not , but couldn't they look inside the atm or verify with the balances and they say it going to take two days of which that was not my fault