DISAPPOINTING SERVICE FROM MAKRO

I am really disappointed with the service that I have received from Makro. I made an online purchase and canceled an item within 24 hours. However, post 3 calls and follow up emails, the purchase for the said item was not canceled. Finally, I called Makro call center again on day of delivery only to be informed that I must reject the item upon delivery. I requested I speak to a supervisor and was informed, after 15 minutes, that all supervisors are in a meeting. I left a message to be called, but sadly have not heard from them. Is this the way customers are treated, especially from a store such as Makro? I would definitely think twice before making an online purchase from them.