Chicken burger disgrace

Yesterday when purchasing a happy meal for my son i decided to buy one of those junior chicken burger - its been a while since i bought one and can roughly remember those use to cost R10 a burger - when i received my slip i saw its now being raised to R18 a burger and i wouldnt have mind paying that if the burger was in better quality. How do you raise a price on something and the standard of it dropped. its just unacceptable.