Misleading buy 1 get 1 free special

I bought takeaways from Zhongchuan in Randburg off Uber Eats. I bought the buy 1 get 1 free of the double portion chicken dumplings with 24 pieces and buy 1 get 1 free of the double portion prawn spring rolls with 2 pieces. I was expecting 48 dumplings and 4 spring rolls, only got 24 dumplings and 2 spring rolls. Either the special was misleading or I was only sent half of my order. How is this a buy 1 get 1 free special?! Also the dumplings were bland, skin too thick and not much filling.