Lack of service and care

I've been a customer of this back for over 20 years now and starting to think its time for a change. Went to deposit money into a atm and the atm just retracted my money. No receipt to prove this. Went into the bank and was told an investigation will be done but what do i do until then. I needed this money to survive. No wonder standard bank are losing clients. Poor service and lack of customer care