Cashier stole my Clicks cashback rewards - beware - your are also not safe

I visited the Clicks Cornwall View branch in Pretoria on 15 April 2022 to buy a view things. I was assisted by a cashier, Temosho. My slip clearly showed that I had an amount of R253 in cashback rewards. This past weekend I wanted to purchase some things online, using my cashback rewards. To my surprise, when I logged into my online account, it showed that my cashback balance was R3. After calling the Clicks customer support line, I was told that R250 of my cashback rewards had been used to purchase some or another voucher on 16 April 2022, the day after I visited the store. I clearly stated to the support agent that I did not go back to the store on the 16th, neither did I use my cashback rewards to purchase a voucher. Upon closer inspection, it was found that the same cashier, Temosho, that assisted me on the 15th, was the cashier for the "voucher purchase" on the 16th. To me it seems as if the cashier saw my rewards and proceeded to somehow use my clubcard number, and my cashback rewards to purchase the voucher. This was done without my knowledge or consent. The store manager informed me that the cashier allegedly cannot remember what happened on the 16th. So, does that mean that he has been *****ing from so many customers that he can't recall???

This is theft and I WILL be laying a charge of theft against the cashier at SAPS