McDonald’s complaint: Bad Service

My son and I went to the drive through and we asked for 4xCokes with our meals, and on the slip they also charged us extra for cokes. when we got home it was not cokes but coke lights. i phoned the shop and the lady said to me i have to came back the next day and they will replace this. I said no i will came back today and we were at the shop again 9:15 and then they said they are closed i must came back the next day. I was furious about this treatment and this is unacceptable. After i’ve lost it she open the door and only gave me 1x Coke for replacement. I’ve said to her that it was 4x cokes as discussed on the phone earlier. She was not happy with me and then she go to the drive through and asked for 3x more cokes. I’ve asked her for head office number and she said – go check that online . When i asked her name she said something like Elisah. Not sure if it is correct and she said she is just helping out. Is this the way to treat a paying customer?