Bad service, Bad food !!!! Very dissapoint by McDonald's.

I went to McDonald's in Durbanville, to get food and coffees for my family as we were visiting my uncle in Hospital (at Karl Bremer hospital). When I got to the McDonald's in Durbanville I ask the girl working in the drive thru that I would like to Redeem a Big Mac on my App she said it's okay I can do that I also ordered 4 coffees for me and my family at the hospital as we were there all day and tired and just needed a good coffee. When I got to the pay point I paid with my bank card without looking at the amount, I then got my receipt and noticed that I was charged for the Big Mac burger, I also checked my app and saw that the 5000 points was taken for the Big Mac burger on my App. I then asked the lady why I was charged on both sides and her response was that the girl taking the orders in the drive thru is new and made a mistake, I told her I understand but now I was charged twice for one item so what can we do about this, she then told me that the points will come back but she's not sure how long it will take. She also said I can come back to the store the next day if it's not there, I explained to her that I am not from that area I live in the Sourthern Suburbs and it's very far for me to come all the way there can't they just refund me and she said no. The manager was not helpful and the staff was clueless and not helpful at all. Anyway I then just left and told them that I will be making a complaint about this, I left and got to the hospital with the coffees I ordered and it was so bad the taste was like dirty water and one of the coffees had whole coffee beans in it and we were not able to drink the coffee and ended up throwing it away. I have pictures of the coffees as well as evidence which I will be posting on social media. I was disgusted with the service and quality of the coffees that I decided to lay a complaint on the McDonald's website. I received a reference number and I only got a call from the store today, the lady said she's sorry about the level of service and that was it, I told her that this is not acceptable and I am not happy as I paid so much money for 4 coffees and all she can say is sorry, she said I must come to the store and to get the coffees again and I explained to her that I live very far from there and that I was only there because I was visiting my uncle in hospital and she just okay, then she kept quiet and I asked are you still there and she said yes, she will speak to someone and call me back with an alternative resolution. After the call I then received an SMS to say that my issue has been resolved even though nothing was done. This is such bad service I feel like I've been ****** by McDonald's. Very disappointed!!!!