Unsuccessful cash deposit at ATM

Greetings all, on the 11th June 2019 I deposited R10,000=00 in R100 notes into the atm at Liberty Midlands Mall, PMB - KZN - the ATM spat out 1 x R100 note which had a small fold in the one corner - I corrected the fold and re-inserted it into the machine - after which the final tally for the deposit came to R8,600=00 -- R1,400=00 completely unaccounted for..

After following up with the bank the next day & submitting a request form etc I was contacted this afternoon to be told that they have conducted their investigation and that there was no R1,400=00 shortfall! - I feel completely violated and cannot even begin to acecept that FNB cannot confirm the missing R1,400=00 - it is 2019 for goodness sake! - there must be footage of the bank employees checking the ATM the following morning and there has to be evidence of that R1,400=00 going somewhere - albeit the gap between the ATM and the wall on this inside of the bank! I point blank refuse to be a victim of technology and point blank refuse to accept this theft lying down - on principle alone I will not let this go & I have to say I was never expecting this kind of service from First National Bank

Sincerely