Dis-Chem Not allowing walk inns for vaccinations

Dischem offers to all walk in vaccinations provided one of registered on the EVDS system I double checked by calling the Menlyn branch if my wife could walk in. I was told yes Went there the next morning stood in the queue only to be told after all the waiting NO WALK ins. Can you believe this? Yet there is a Dis-Chem board displayed offering walk inns? Pathetic to misrepresent this offer for walk inns especially during the pandemic when no one want to expose themselves unnecessarily by standing with others for hours.