Could not buy kfc during operating hours

KFC Langenhovenpark, Bloemfontein. Business hours stipulates that they are open till 22:00. I understand Covid situations but I was there at 21:45 and they closed the door in front of me and let the last person go in. Please take note that, that person was then the only person in line and the security just showed me away. I feel that its bad service as they allowed people but stopped me during working hours