wrong advertising

i went to dic-chem and wanted to get the replacement roller heads. the price that was with the rollers said R99.99 as i got to the till the lady scan it as R149.99 i said the price i got this said R99.99 to find out the price that was with the rollers was for the cream. this is wrong advertising then the supervisor said i should go to the guy on the floor and go speak to him i was already standing there 10min waiting for this to get shorted i feel why should i go to the guy on the floor iam the customer he should come to me i think there was no customer service at all and wrong advertising