Turkish Airlines Flight Changes and My Inconvenience

I purchased a ticket from Turkish Airlines with the reservation code 'waheie'. I was informed that I would be flying with Anadolu Jet and I accepted. Five months after purchasing the ticket, I was told that Anadolu Jet had closed and that we would be flying with 'ajet' instead. I accepted this change, but then they notified me that my flight time was pushed forward by 1 hour and 30 minutes. I accepted this as well. The next day, I received another message stating that my flight had been delayed by an additional 4 hours. I had made reservations for my vacation and with their new schedule, I would arrive at the hotel at 22:00. I would miss the first day at the hotel, which costs ₺15,000 per night, and I would arrive at midnight with my 10-month-old baby. They say I can make changes, but there are no flights available on the same day or within the same month. They suggested flying from Istanbul Airport, but that flight is also delayed by 2 hours and takes an additional half hour. Although there are seats available at the same time, they are only for business class. Moreover, there are tickets available for new passengers on Ajet's own ticket sales page. The changes to the brand and flight were made without consulting me. This situation is unacceptable!