Not taking responsability

I went to PnP Hyper in Brackenfell. At the till the lady asked me if i wanted bags, and i said yes please. The packer, Dorothy, put all the bags in trolley as well as the 3kg Omo & dogfood. I asked her who told her i didn't want those in a bag. Her excuse was (a) that the till attendant didn't give her enough bags; (b) i should have told the till attendant how many bags i wanted. This is bad attitude to pass the buck. Dorothy could have used her own inisiative.