Carnival branch don't answer their phone

Trying to buy something from Makro when the closest one is 150km away from you and the courier services always get lost when you buy on-line, is impossible. I used almost ALL my airtime, phoning the call center 7 times using almost 25 minutes airtime, trying to get hold of somebody at Carnival branch as the stock was low and I will be driving past them on Friday when everything will probably be out of stock. I wanted to ask if they can keep some for me to pick up on Friday, but they just don't answer their phone, even when the call center try to put me through. Tried Carnival 3 times!!!!