Terrible service and food from Barcelos

Absolutely disgusted with the service and food from barcelos at phoenix stanmore ,I found a black persons hair in my shwarma upon sending images to the store manager he did not assist me in anyways,its day 5 and I have not gotten a call or message telling me how they are gonna resolve this issue ,tried contacting head office the line rings and rings . This business will surely fail as they do not assist their customers and their food is terrible .Guaranteed I wil never be supporting barcelos again .