I want my refund !!!!!! . Poor service

On the 23 November 2018 i purchased electricity (first attempt) through the nedbank money App - the money was deducted from my account but I did not received any notification . I than tried the second attempt , the money was than taken out of my account but no notification . I was preparing to go to see my grandmother (where he lives alone) but time had gone wasted because I could do anything , so i decided to go the mall and buy electricity . Over R200 wasted because Nedback is not responsible with the App. I tried calling through to Nedback but no one answered on the same day , i had to leave a "call back request". I only received the call back 2 days after on the 25 November 2018 - A lady assisted me but she claimed that she will transfer me to someone that will be able to help me with regards to my query , the lady that i was transferred too SEEMED TO BE CLUELESS , SHE PUT ME ON HOLD FOR SOMETIME AND ADVISED THAT SHE WILL CALL ME BACK THE NEXT DAY , NO CALLBACK SINCE - It is the 01 December now still no resolution of my query . PLEASE HELP ME !!!