My food were touched by another customer

I ordered a Pizza, triple decker & when th waiter delivered it I noticed that th box had oily finger marks. I didn't think much of it even though it was the first time I have seen anything of that nature. 7-10 minutes later, while I was enjoying my Pizza th waiter knocked at my door & told me that there was a mix up of orders and that my neighbors ordered th same Pizza but theirs was of a lesser amount of money. <br> <br> Immediately after he said that, I thought of th marks on the box and that th neighbors opened my Pizza, touched it to check if th toppings were those that thy ordered.I was disgusted by th fact that someone fiddled with my food, with dirty hands. I asked him if that's where the marks on the box are from, & if th neighbours opened my pizza. He denied it, & when I asked him how did they know that the pizza is not what they ordered he turned his back & left.<br> <br> I called the shop & explained my story to th manager. The manager said to me that there was nothing he can do because I have already eaten half of the Pizza.Then he said to me that I mustn't eat the other half & that he will get his senior to call me & see how we can sort this mess out. nothing was done till today.