Reschedule the Party

My sister called me up yesterday. We have not talked for a while. A big party is organized for her daughter. She was very upset because the party of her daughter will be moved on the 22nd instead of the 15th of this month. She is very busy repairing her house. Some tiles are slightly broken. She was very angry because the people who installed the floor tiles are not experts. The files were unevenly installed and the grout in-between was not well applied. It was coming up. They have to learn more on how to install the tiles, she said. The party will be moved because of these untrained laborers. She had spoken to the contractor and said the tiles must be changed without any additional costs. The contractor agreed her request if not she will not pay the whole contracted amount. It was the fault of the contractor that his people are amateur in doing that skilled work.
It is very frustrating to know if you are expecting things and works to be finished in a certain period of time. Her daughter's graduation party will be rescheduled due to the delay of the work.