Pegasus Complaint Regarding Denied Boarding And Ticketing System Discrepancy

I purchased a Jeddah–Istanbul flight ticket scheduled for March 24 at 09:20 via the Pegasus mobile application on Apple and later made a change to this ticket through the same channel. After the change, Pegasus confirmed that my ticket was active and valid. However, when I arrived at Jeddah Airport, Flynas staff stated that they could not see my updated ticket in their system and that only my old ticket was visible, and for this reason they denied my boarding. At the airport, I contacted Pegasus customer service via the call center, and they once again confirmed that my ticket was active and valid, but claimed that the issue was on Flynas’ side. When I spoke to Flynas staff at the airport, they stated that the updated ticket was not visible in their system and they refused to board me. Thus, I was left between two airlines blaming each other, and no solution was provided while I was at the airport. As a result of this situation, I was denied boarding, had to wait for hours at the airport, and my mother was forced to travel alone on the flight while I was left behind. In order to be able to travel urgently, I had to purchase a new ticket from Turkish Airlines at a cost of ₺25,000. In addition, I incurred extra expenses such as international line activation, and my Pegasus ticket remained completely unused. Despite sending a detailed email to Pegasus afterward, I have not received any response to this day. I have evidence supporting my complaint, including screenshots showing that my ticket was not visible in the Flynas system and Pegasus’ confirmation that my ticket was active. I request the reimbursement of the ₺25,000 I paid for the Turkish Airlines ticket, a full refund of my unused Pegasus ticket, and compensation for my additional expenses and the serious inconvenience I experienced due to being left between two airlines without any solution. Otherwise, I state that I will pursue my legal rights.