Ackermans employee "*****s" my money.

On Thursday 07th October,I sent my life partner (whom I made a secondary card for) to make payment on account for an amount of R500.85 at Soshanguve Southview Complex. Apparently he was assisted by a cashier named Thulani,he gave Thulani R501 and instructed him to make R500.85, unfortunately the cashier rang R584, after he realises his mistake he switched off his Till's server and reset it in order to void the transaction. My life partner asked to see the manager to resolve the matter as he insisted on a receipt but the manageress instead went to other till for balance enquiry which reflected a different amount but still my life partner insisted on a receipt which the store failed to provide,he then left the store unhappy and worried. Following day he visited Garankuwa branch to collect laybye(shoes I was supposed to wear Saturday morning for a funeral) using the account through his secondary card,he was humiliated as the transaction was declined due to no credit available,he spoke to the manageress who contacted head office but the lady at the head office refused to speak to him saying he is not the account holder, thought he has been using the account for over a year and was willing to answer security questions. He called me while at the store and I immediately called the head office to find out what happened to R501 payment and the consultant was very rude and she hang up on me (it's the first time ever I hear of a consultant who hang up on customers) I called again and the second consultant traced the funds and adviced the store (Soshanguve Southview) reversed the amount, now interesting where is my money?, because 1. The customer doesn't have the money in her hands, 2. The money isn't in the customer's account, and 3. The cashier reversed the funds without notifying or customer's approval. I am planning to go to police station to open a case of theft/ ***** against the cashier(Thulani). What pains me my account is going to fall into arrears whilst I paid on time,get penalised interest for none payment and have an adverse profile at credit bureaus which will affect my possibilities of getting credit/loan in January to assist to cover school fees, uniform,ect for my young children.