Is there a complaints email address for kfc in britain?

its sounds weird but does anyone know if there is a email address for kfc as i would like to make an official complaint i paid nearly �6 pound for a boneless box of chicken which me and my boyfriend intended to split and got a small drink 3 tiny strips of chicken which were about 3 or 4 inches long a small fries and a tiny box of popcorn chicken. in the end i ended up gettin a chicken burger that cost 1.19 and it filled me upmore than the banquet box