Bad service

I booked a flight for the 26th of June for two adults and 1 child from Cape Town to East London. This is the day they made a false advert saying tickets will be on sale the, but they were still the same price the whole day. I Checked in online. We were a bit late but since already checked in online supposed to be safe, the lady assisting us for the boarding pass ask the manager if he can help print the boarding pass but the manager refused saying don't check them in its closed already was so confused because he didn't even listen to what we are saying just jumped to conclusion. We had a bag which I thought I paid it under my son as it was his luggage, But unfortunately, I didn't pay. They said we cannot go because of the bag and I told them we cannot all three stay because of a bag hayiboooo, then they said the 2can go but I am not. I told them I will leave the bag and they cannot say I am not going because of the bag they can just say the bag is not going chiii, eventually they printed b/pass dragging the process so that gate can be closed. When I was boarding my name had a red note which they did not show me and they had to call and ask that manager and he said I cannot go because of the bag , Luckily for me I saw some kind lady and we exchanged numbers and he took the bag and I told them that I am going as I don't have a bag. Yhoooo this flight is a nightmare first it was, 1. False advert 2. Blocking my name instead of a bag making a booo people were staring at me thank God I had a musk on. 3. When booking the flight back purchase was successful but couldn't check in online their system kept saying there is an outstanding balance had to call as I didn't know there was a pending balance, they said payment didn't go through. This is really exhausting!!!!!