Turkish Airlines suck

My flight was delayed for five hours, then canceled and rescheduled for the next day. So I spent $100 USD taking a cab home (where I paid in cash) and a $120 USD taking an Uber back to the airport the next day, only to find out that my rescheduled flight was delayed for another five hours. I lost 1.5 days of my vacation and had to pay an extra day's worth of hotel at my destination that I never used. All of these delays and cancellation were due to mechanical issues with the aircraft, not weather.

I used their Feedback form and sent them receipts of my Uber and of my hotel. I didn't have any receipts for the cab I paid in cash (my mistake). They said they can't do anything because I didn't send invoices when I clearly did. What is my recourse at this point?

I will NEVER fly with them again.