VERY DISAPPOINTED WITH FNB!!!!

I am very disappointed with FNB service especially during these hard times in our country. I tried to deposit cash of R2100 into my FNB account but the ATM said that it was unsuccessful and my account was not credited. The security guard assisted me with the claim form and helped me with submitting to the relevant department. 2 days later I received a message with the reference number for my claim and it also said I should expect a call in 24-48hrs. It has been over a week and I have not received any response from FNB needless to say that I have not received my money back either. This is the message I received : FNB:-) Complaint ref *** has been sent to FNB Self Service Delivery. Complaints ***. A consultant will contact you within 24-48 hours. I keep receiving the same message but it seems there is no progress. I joined FNB less than 2 months ago and yet I find myself now regretting this decision as my experience has been so disappointing. Because of this, my rent for this month has not been paid in full as this deposit was the balance of what is due. Please help urgently!!!