Bad Service

I bought pizza with extra cheese and when my pizza arrived it had no extra cheese, so i called the store to complain, the manager told me to come check their cctv footage and insisted that it was done accordingly, in the footage i can see the pizza but i can see the person's hands, the manager said that cheese is measure by a cup n two hands of that employee equals 3 layers of cheese, he later claimed that the employee was measuring the cheese but that is not visible in the footage. i asked for a courtesy of them preparing a pizza for me using whatever cup they use to measure because i can clearly see no cup was used. I was told i will have to pay for it if i am not happy then i should call head office, i did and the person i got told me he will log in a complaint and i will get a case number but till now no case number. I feel i have been taken for granted, i eat pizza once to three times a week i know when a pizza has extra cheese unless if from this passed weekend the decreased the quantity. I am willing to take this to my lawyer not because i wasted my R60 but because you cannot take your customers for granted like that.