Unpleasant customer service

So I was in spur Vanderbijlpark yesterday at night I and I received not a pleasant service I ordered cheese garlic prawns schintizel and the lady got me cheese garlic prawns and I showed her at the menu because I struggled to say schnitzel I guess she was not looking at me, while eating am like no this can't be what I ordered and called her and I asked her is this plate supposed to be like this and said yes... I said so where is the chicken breast fillet, she said no that is not what you ordered let me call the manager, I asked how is the manager going to solve this and insisted on calling the manager. The manager came slim short lady and when she got there stares at me, and am like am I supposed to explain to you again and she said yes your waiter has already said her side of the story, OK I explained then she said ok I'll take your plate and give you what you wanted, I said no it's fine I'll order again and still pay for this one. Why I ordered again and not let her change my plate is because her face had an attitude the whole time so if you want to help me but I don't feel it less leave it that is how I took it but didn't say it to her... So the whole thing didn't really upset me, what got me upset is that the parking lot lady came to me and asked me why would I buy food worth R460 and tip the lady R7 how did she know and continues to say I must tip her 10% of what I have to pay. And when I came out the lady that was serving me was outside with the manager so the manager was aware of the whole thing.. I did not take the lady's name because I was not planning on writing this whole thing. She is short, has a short cut seems like she had a dye on. Why would I tip someone 10% of what I had when I ate food that I didn't want to have.