Terrible Pizza quality

I purchased two standard pizzas, Tikka Chicken and Club flavours, last night. Firstly when I requested for my receipt I was not provided with the receipt and was just handed the two boxes of Pizza. The quality of the pizza was such that my daughter and I had running stomach for most of last night and today. My wife called the manager Rahman last night within 15 minutes after collection. He acknowledged that there was a possibility of them not using the correct dough or not preparing the pizza correctly due to them being very busy. He promised my wife that he will replace the two pizzas and deliver on Sunday. However when my wife called him on Sunday to ask him to deliver on his promise he retracted and said the owner said we always complain and he must not replace the pizzas. When I tried to speak to him and informed him that I will be complaining to Head Office he said that is fine as nothing will happen as per the owner.