Blatant and unfair overcharging

I feel ****** to say the least. We have been going to John Dory's at Riverside Mall to enjoy the 1/2 price Wednesday for years. Upon our recent visit, I was shocked to see how the prices of the sushi has increased and how the amount of sushi decreased. I remember my last visit, not so long ago, the green plate was R38. The cheapest plate is now R38 and the most expensive one, I think it's black, is a whopping R55. But, you get almost half the sushi you used to get. The portions are much MUCH smaller, and they cut the amount of filling by more than half! Let me explain. Last night, I has a Californian Roll with prawn filling, topped with tempura-rolled prawn and spicy mayo sauce, also known as a prawn avalanche. If I remember correctly, and I am pretty sure I am, you used to get 1 prawn on each of the three pieces. They now divide the prawn into three, and then cut in half AGAIN. So you basically end up getting an oily clot of batter, with no prawn inside and no Ikura on top as illustrated on the menu, for about R19 more per portion. Now I'm not someone who likes naming and shaming people before speaking to the manager, so I did. She apologised profusely and acted like she didn't know that it's being done that way. She brought me a new plate, with four fresh pieces, with a tempura prawn that actually contained a bit of prawn. Wow, now I'm happy (or not) I am not going to forget about all the other customers being ******, and blatantly overcharged.