Turkish Airlines Canceled Flight 1 Business Day Before And Passenger Rights

My flight TK7671 (On May 1st) from Paris to Istanbul was cancelled on April 27th (the evening of the previous business day). I was only informed about this via email. With limited connectivity and communication options abroad (having to purchase an international calling package in the middle of the night, etc.), I managed to reach the support center and requested them to arrange an alternative flight for me on the same day. However, they informed me that there were no available flights to the same airport and that they could reschedule it for the next day. I inquired about whether they would cover the cost of accommodation abroad, and the support personnel advised me to contact THY's hotel/accommodation department for that information. Since the relevant department was closed in the middle of the night and I had only one business day left to arrange accommodation in the worst-case scenario, I emphasized that this put me in a difficult situation and that the support team should assist me. After 3-4 different support calls, I managed to find a ticket to a different airport on the same day. THY made no effort to contact me regarding the cancelled flight (aside from the email they sent, which I might not have seen). Even when I reached out to them, they ignored my passenger rights and failed to provide any information or offer a constructive solution. (They tried to provide a ticket for the next day but did not mention accommodation, transfers, etc.) As a result, on May 1st, I had to take a taxi with my 2-year-old daughter and wife to Istanbul Airport instead of Sabiha Gökçen Airport to retrieve my car parked there. I spent 800 Turkish Liras for this transfer. Due to this transfer, I arrived home with a delay of 2 hours. In other words, they took me to Istanbul Airport instead of Sabiha Gökçen Airport, which was the destination stated on my original ticket. THY's response to my request for at least reimbursement of the taxi fare was superficial. (Request No: S1-25349445) I will file a compensation claim with the General Directorate of Civil Aviation regarding this situation.