My Apple TV Stolen from British Airways Checked Luggage – No Compensation or Support

On July 3, I flew from Los Angeles to London on flight AA/BA1613 and then from London to Istanbul on flight BA0680 with British Airways. When I arrived, I discovered that my sealed Apple TV had been stolen from my luggage, leaving only the empty box behind. On top of that, the food and service during the flight were terrible. I feel completely cheated, especially since I paid for this experience, and I haven't received any form of compensation. How is British Airways going to fix this? I will never fly with them again if this issue isn’t addressed immediately! I expect proper compensation for the theft and poor service.