Disappointing service from Makro Alberton

I am utterly repulsed by the service i received at Makro Alberton. When a business upgrades their online shopping system, this whets the interest of a customer who looks forward to a more improved online shopping experience. Unfortunately, Makro deprived me from the pleasure of a good experience with the disorder that reigns over their service standards. I placed two grocery orders online. The "upgraded" system kept failing my order and i had to waste time repeating the process. i ended up failing to systematically change the delivery address to my desired one as the new system no longer gives that option. I then paid about R8000 for the order then i called an agent to change the address for me as they have access to the back-end of the system, she said that she had done this. The other order was meant to be delivered to the address that was on the system so I did not have issues with it. Both orders were placed on Tuesday 5/03/19. On Friday 15/03/19 I received a message that the order had been dispatched and i would be contacted with further updates. I called to confirm that the address had been changed as per my arrangement with an agent and i discovered that it never changed and so i changed it with the agent i spoke to at that time. To my appalling surprise, the order went to the wrong address and now all the groceries that are needed are not available and we do not have the means to move the order to where it needs to be. They have been ignoring my calls and promising to call back and have not. I am sitting without the groceries ordered and forced to make an interim plan to buy the groceries we need urgently and pay for transport to get our groceries to where we need them while they ignore me! I have been holding all day for Derek Meyer who is not available.