Horrific service

Hi I went to engen garage this morning the one on 650 e’skia mphahlele Drive trying to buy some energisers the one on promo but I took the wrong ones . When I got to the tills I got a cashier by the name of Thabang he was very rude and told me he is not his job to tell me about promos and which products are the right ones . He was in a bad mood I tried reaching out to the supervisor but the service was as bad … I’m really not happy with their service as this ruined my morning .