Terrible service to frail passenger

I am really upset regarding the flight for my mother in-law, booking number: SGHCRL Cape Town Airport - Lanseria Airport Wednesday, 19 Jun 2019 17:00 18:55 Non-stop Flight JE716 She is an 86 year old, diabetic, and has to eat regularly. She booked in for her flight and requested wheel-chair assistance to take this trip. The flight was delayed, she sat at Cape Town airport from 15:30 and her flight only arrived at Lanseria at 21:00. She went without food for this whole time. No arrangements were made or snacks provided, and then on arrival at Lanseria non of the shops were open anymore. This is really very disappointing service.

My husband was assured at Lanseria airport that a meal would be provided if the flight is delayed. None of this happened.

I am not really not happy to with this situation