Deadly bite

bought a Steer king burger with cheesy chips at this branch as take away and to my horror after eating my chips I took a first bite and a second bite out of what was supposed to be my delicious Burger but it almost turned deadly as I bit into some metal in my food I thank God I didn't swallow it because I don't know what harm it could have done internally. I tried to check the receipt to call the store but it had no numbers on the slip so tomorrow I must drive back to that place to show them what they did ..so much for buying a Steers burger i almost bought my way into hospital I should have gone to burger king like my husband