McDonald's

I went thru drive thru i ordered a large ice tea and 2 big macs w xtra sauce...i was charged 50 cents xtra per burger..so i cancelled the xtra sauce...im eating one in my car almost completely and a piece fell off with several. Black public hairs hanging out of the burger i immediately stopped eating it and took pictures...i went back to store and got a refund...however after i looked at the pics closer i saw not just one or 2...but a whole bunch because it looks like. A deliberate action...not a mistake...i lost my appetite and now im scared to go back