Insufficient stock of popular item, and rude customer care agent

Good day. I have notice that a product advertised on Makro (Pamper cat food megapack) which is supposed to be currently on promotion until the 7th July, has been saying "sold out" online and with no further details to look out for restocking. Surely a big mass-mart like Makro intends on replenishing stock in the foreseeable future? So since I shop regularly on their online platform, I opened their Live chat forum and put this query online, only to be told by the Customer care agent, Siphamandla Mthethwa, that he doesn't know and I should contact my nearest Makro! I tried explaining to him that since i am referring to an online issue - why should I be expected to physically contact a store when he surely should be doing this for me. He then rudely and abruptly ended the chat! This was unprofessional and rude and makes me not want to shop at Makro anymore, and I spend thousands monthly usually.