Price changes,wrong price point

i am Siyanda and on 02/08/2015 i went to Dis-Chem to buy Pampers in bulk for my unborn baby! The price point that was in Pampers Premium was 165 and infront in Pampers acyive 185,so when paying prices didn't correspond! Manager/Supervisor was called named Lawrence and he was so rude to me,and i told him as a customer i'm paying for the price i see he said it's not his fault.I took pics and he said i should remember his also gonna take i've never felt so embarassed in ma lyf. is it maybe because of mh colour,he should've done price override den rectify mistake with his staff.He was so rude i paid and left the store dissapointed and embarrassed,got pictures as proof.