The best restaurants serving Fast food food in Trowbridge Drynham Wiltshire South West

Almost everything you order comes with the option to 'make it a meal', which involves adding a drink and a side. So why are the staff totally unable to put the drinks or sides into the bag? 4 meals ordered, all wrong with items missing. I could understand if it were a complicated menu and we had asked for unusual changes or substitutions but fries and a coke is surely about as basic as it can get?