Negligence by airline served harmful substance in food what action

I Have traveled on 26th Feb. from delhi to Visakhapatnam by Air Asia airlines I pre booked the meal through that airlines online. I got the food from them during travel and when I started to eat the food I found very small plastic particles in my mouth so i took out from my mouth and I complaint to crew members they told me --MAY BE THE PLASTIC FORK BROKEN AND MIX IN THE FOOD". I saw the plastic fork that was broken on front side. But I surprised how that airlines can provide the poorest quality of fork and if that plastic went into the stomach it could be harmful to me. please advise me