Coles Supermarkets

My shopping receipt is: 26694123 25/2/2018. I am querying price on a special . This was 150g.sugar snap peas and 150g. australian snow peas. I was charged $3.00 for the snap peas and $3.50 for the snow peas. I only bought them because the price indicator said 2 for $3.00. I realise the amount is minimal but it's the principal. The staff member at the self serve c0uldn't have cared less and directed me to a checkout. This staff member left her section to check and then tried to tell me it was the larger packets that were on special. I left without further chat because all the people behind me were complaining. I shop at Coles and nowhere else and I am quite upset that I feel ripped off. I need the money more than Coles. I would be obliged if you check up please. If I am wrong, I apologise. Cheers