Horrible service experience

My family and I recently moved from Pretoria East to Pretoria North in Annelin,on the morning of the 1st/10/2020 after our move, my husband with our 2 small kids went to McDonald's Kolonade for breakfast,we went to the drive through,upon arrival we placed an order on the speaker, immediately we picked up the lady taking the order was very impatient and abrupt,my husband proceeded to place the order,after that the lady went mute,without confirming the order or confirming the total amount nor advising us to proceed to the next window. My husband was still waiting for her to get back to us when we then heard her taking another order on the next speaker,we then drove to the next window where we found her,she did not even greet,she continued taking the other order without even acknowledging us while right next to her,my husband asked if she got the order right as it was clear she didn't since she didn't come back to confirm,as we suspected,indeed she had taken the wrong order,we asked for 3 big Mac meals and a happy meal,she only took an order for 2 bib Mac meals n the happy meal without the 3rd big Mac meal,we corrected the order and I then asked why she wasn't giving us the service we are paying for,she rudely asked what our problem was,after realising her attitude I chose not to engage her but asked for her names since she didn't have a name tag on,she said her name is Tshepiso,I asked for her surname to which she refused and asked why were we asking for her names,we said ok and proceeded to the next window after paying .we asked for the manager who confirmed the lady's names:Tshepiso Sedutla. We explained to the manager what had happened,he tried to explain the issue away and was very dismissive and it was clear he couldn't wait to have us leave.This is so appalling to have someone that represents such a huge international name treat customers as poorly as that n not even have a competent manager to remedy the situation,this clearly showed why Tshepiso didn't see anything wrong with her horrible service towards clients because it seemed like enabled behaviour. We have 2 toddlers and we don't feel comfortable going back to McDonald's Kolonade after such horrible experience and it is clear to our new home.