Shocking service

We booked for 3 persons table 22 at the window for 12:30h. On arriving, the table was occupied. They said we reserved for 11:00h. LOL. They served Starters and Main course together at the same time! After we refused the main course until finishing our starters, the main course was later returned. It was obviously heated up in the microwave. A potentially good meal was thus made rubbery and tasteless. To compensate for the shocking service, the manager offered us a cappuccino on the house. We ordered 2 with foam and 1 with cream. Also that was impossible to do: they brought 3 with foam. When paying, we rounded the bill up with tips to R600. One guest paid R200, the other 2 would paid R400. Also that was a problem. The waiter needed a calculator to deduct R200 from R600 and in the process did it wrong!!! Never ever did I experience such total lack of job knowledge or experience.