Gift voucher redemption nightmare!!

I purchassd 2 vouchers on the pay me now app a total of R1530. I went to the Checkers on the 19th June at 6pm in Kosmosdal to redeem them. The lady at the money market counter told to me to register first by dialing *120*3534# it prompted me to complete a list of questions. Once I was done she then told me the vouchers were not showing on her system for redemption. Only later did she realize that the number that I used to register was not the same as the one I have on my pay me now app. She tried to change the number but still had difficulty finding the vouchers. After an hour of trying to fix the issue she gave up. Then asked that I call the call centre to resolve it. They have now told me that I must wait 5 working days for the number change to be done. This is absolute madness as we literally have no food at my house. I should have opted for Pickn pay or Woolies who both have a much simpler process with zero pain. Just giving awareness of the pain and trauma you go through with the checkers gift voucher process.