Mega U Not Working Benefits!

Last Week Wednesday I sent an email to benefits team at ABSA since the Debonaires voucher that my son received says already used, I logged it on the email provided and no response not even an automated response ( how unprofessional!!). Later in the week I picked up a phone and spoke to a Khanyiso Chauke who claimed that the voucher might be an online voucher hence it did not work at an outlet after I told her that I did try it even online and then she said she was going to escalate, well I guess she is still escalating since I still have not heard anything back from anyone. Why have benefits if you cant get them right??, it was the same with the movie vouchers where you get to a Nu Metro and the voucher has an error and now you dishing out used vouchers?? Please do not waist my time, I need someone to sort this out ASAP!!