Poor investigation into our matters

Very disappointment that they can tell me they can't investigate my matter. I called customer care immediately and went to branch next day. I deposited money at MAPONYA mall branch and electricity went off jus after i confirmed the details of receiver and amount. I waited 20 minutes for it to turn back on. Customer care said it's safe for me to go as long they machine took thy money thy will see it next day and when I went to branch i was told to ask mall management for footage. No one can investigate my matter or my transactions even when I give full details of time and machine number