Unfair coustomer service

Was at gateway Macdonalds, after ordering my food an sitting at my table which I wait 20min for a second family comes an sits at my table without my permission, i called an informed the manager(Shiven)of that an due to it been covid an social distancing I told him that's not right, but he had an attitude side with the other people am refused to make them move ,my food was unfinished because of this ,this is unacceptable an I want action taken up an money for my food that was left back