Pathetic Service at Chatsworth SuperSpar

I saw an advert for a 6 Pack milk at Spar for R69.99 on Tuesday Afternoon. I went there specifically for that on Wednesday Morning. Didn't have transport, so paid petrol and hired a car. When I got there, I looked for this item and was told by a very Uncaring, Unprofessional personal that it had " Sold Out"... How come they advertised something that they had no stock of and run out in under 24 Hours of a "Special Offer going live... This is ALWAYS happening at this store... Pathetic.