Why am I been charged for cash deposit at a ATM

I complained about getting charged for doing a cash deposit at a ATM. Standardbank rep**** with a bank pricing form???? My complaint was why do I get charged for cash deposit at a ATM when no teller is involved but a machine doing all the work. My complain had nothing to do with pricing, I wanted to know how can Standardbank charge me for a cash deposit done by a machine. REALLY??