Extremely BAD Customer Service

Yesterday the 10th Oct 2017 at 15:36 me and my 4 year old went to KFC to have lunch as we were from my little one's doctor and we left home early without eating anything,when we arrived at KFC , my son requested a toilet and we were told THAT the toilet is locked and the person holding the key is not there, i asked why and then they said she is just not around and they don't know where the person is gone to, i was really surprised to hear such a foolish reason,anyway we continued with our order hoping that by the time we finish eating the person will be back, so we bought our lunch,sat and ate there,while eating my son needed the toilet desperately as he was not fine hence we were from the doctor,i asked the cashier {Agreement}who was remorsefully,professional and sweet, she answered me and said she will attend me after taking the order of another customer, all of a sudden a lady by the name Fortunate came from the other side of the kitchen and told me they don't want customers to use the toilet bcoz customers spoiled it now they don't allow anyone to use it,i begged her to at least to just allow the child ,she refused and told me to go to the mall which is across the road,i said to her how can i leave my food and cross the road ad come back to finish the food? then she told me not to make my problem hers,she then went back at the back and chat with her colleagues about me, i could hear them talking and one even said"haa she will be strong" who the hell does she think she is" i got so angry i called her again and ask to see a manager she then played me for a fool and told me there's no manager it's only a supervisor but 1stly she said there's a manager she will call a manger, she went to the back and came back,then she said there's no manager only a supervisor and then i asked her to call the supervisor then she told me ,the supervisor is busy with the manager, that's when i asked her why is she playing me for a fool?she said to me i don't know why you even waste your time because you wont get the key so you better finish eating and go elsewhere to find a toilet,i felt so angry, humiliated,very frustrated with my son's condition and even wanted to cry in front of people,i waited at the counter for the key for 45 mins still to no avail,meanwhile begging for the key my son pooed on himself, luckily he was wearing the nappy pants,i got so upset and started arguing with fortunate and she repeated " i said don't make your problem our problem" then a guy from the back came to the front and i thought he's the supervisor and he's coming to assist, mhm! to my amazement, he just came there to continue with his work, ignoring me as if i'm not there and then another customer called him with his name, i think his name is Kutlwano i'm not sure as he was not wearing name tag,the lady ask him why don't they help the child at least and he said he can't intervene as he found me and Fortunate arguing and he doesn't know the reason why, I was a joke in the store ,your employees were laughing,talking about me but still i stood there,also there was a lady by the name Rica who was busy calling orders and ignoring me when i'm standing there, she was quiet, when i wanted to talk to her she turned her back at me, so i got so angry that my son even did number 2 on himself and acted foolishly as well to get their attention, I changed my baby's poo in front of all customers and then all of them from the back came to the front and swear at me, calling me with all sorts of names, even using vulgar words,now they all gave me bad attention as i was acting like that,the so called Kutlwano continued swearing at me until went out of the shop, he even said to me "I opened my legs for a man who gave me a child who just want to poo because he ate their food i shouldn't make it their business , he shouted with vulgar words even outside the shop, people from the across mall were watching, listening to him and Fortunate saying horrible words to me outside in front of everyone who was watching, every customer who was in the shop, I left your shop crying like a baby, frustrated and humiliated and felt the pain i never experienced before since i was born, it was a show i never saw before, servants behaving like that to a customer? this was a shock to every customer who was there. I'm pleading to KFC Managers to remove these employees from your business and they are ****ing your business and if you don't act on these idiots who don't respect their job , I will take the matter to the press and i will sue your company . I know you have cameras and you can check or see the footage. I expect feedback from KFC in Kempton Park on Monument Road to respond within 7 working days.