STILL NO REFUND

After arranging that I will be paying via eft on the 31/12/2019, still there was a debit order that went off. So my account was paid twice. R800.12 x 2. The lady i spoke to 31/12/2019 NEVER made a note of advising that I will an eft. On the 14th of January 2020, I made the eft as promised. The next morning Cell C took a debit order for the same amount. I immediately called and I am still waiting for the accounts department to call me back. This person supposedly made a note on the system that they called me for the proof of payment, which is not true, I have been the one calling the whole time. Please check your records and recordings. I have sent the proof of payment 7 times via email to *** and *** and to one of the consultants. Every single time I call, I get told they are waiting for the proof of payment, although both payments show on your system. You guys have until the end of business today, to refund me R800.12. I CALLED 13 TIMES AND SENT EMAILS 7 TIMES, WHAT DO I HAVE TO DO, TO GET MY MONEY BACK.