Reporting bad service and requesting for my money back

On the 1st of April 2019, I swipe for R50 electricity (with my Eskom card ) and R750 cash back but the cashier gave me electricity of R750. I reported to the pick n pay supervisor, who then contacted Eskom requesting to reverse the transaction. The Eskom's response was that it does not have the powers to reverse transaction only the shop (pick n pay) can refund me. The supervisor then called the pick n pay head office and their response was that they will escalate the matter and come back to me before the end of the day. They also told me to leave the electricity slip with the supervisor. When I do a follow-up pick n pay head office transfers my call to the shop at Westgate mall (back to the supervisor who told me that only the head office can help me). The pick n pay supervisor then told me to come and collect the electricity voucher because they won't be able to refund me.

I also tried going to my bank to reverse the transaction but I was told that only pick n pay can reverse the transaction.

Please bear in mind that the requested R750 cash back was transportation fee (for me and my child). That day of the incident I had to borrow R10 to catch a taxi back home from the mall.

I would really appreciate hello peter to help me with my problem as I have not received my R750 back and I do not need the R750 electricity because I stay in an RDP house which does not utilise that much electricity. The electricity slip is still with the supervisor till date and I have not received my R750 back.

Warm Regards, Sandile Mdakan