False advertising

Went instore today at OK minimark vaalpark and bought the c***** yogurt which were advertised as 2 for R30 however when i get to the till the scan R30 each which is also the incorrect price according to the store labeling which was R24.99. Instead of rectifying the error according to the special i was offered a R10 refund. Im not impressed with the lack of client care and false advertising. I ended up choosing different flavors which is rather disappointing