ATM Cash Deposit Malfunction and lack of feedback

I went to an FNB ATM to make a cash deposit into my FNB Account on the Saturday 10th August 2024. I was able to make 7 deposits successfully. On the 8th deposit, the ATM went offline after money was placed in the ATM pocket. After a few seconds, the ATM issued an UNSUCCESSFUL cash deposit receipt.

I was advised to go the branch to complete a form which I have done on the 12th August and since then I have been advised by the branch that the excess cash retrieved from ATM doesn't match with the amount I deposited. There has been radio silence and this is really disappointing that no feedback has been given so many days later