24 Hour McDonalds

On the 4 of September, I got to the entrance of the McDonald's establishment only to be told that they are closed. I thought that there might be a problem, so I did not make anything of it. On 7 September, I went again, and I was refused service again I asked them "Why, because the sign outside says open 24 hours." The representative told me that they are only open 24 hours a day over the Weekend. Please can McDonalds take that sign down because it is false advertising? Or alternatively, add 24 hours only on Friday Saturday and Sunday. And I would appreciate it if the staff could tell me why they would not serve me the first time round so I would not have wasted petrol going to the restaurant a second time.

Location:McDonald's Marlboro Gardens, Sandton