Turkish Airlines Canceled My Flight Without My Consent and Provided Poor Customer Service

On September 15, 2022, I purchased a ticket for the Ankara-Dalaman route with the ticket number 2352481188597. A day before the flight, I received a message from THY informing me that my flight was canceled. I called the call center and was told that they could not refund me, but I could use the ticket within one year, and my ticket was put on hold. On September 9, 2023, I contacted customer service to use my open ticket for another flight to Dalaman. They informed me that my ticket was issued on July 18, and the validity period of the open ticket was one year from the issue date, which had expired, and they did not create a new ticket for me. I explained that the call center representative had not mentioned anything about the issue date and had simply said I could use it within one year. I submitted feedback, and after reviewing the call recording from a year ago, they confirmed that the call center representative had given me incorrect information. Despite this, they only offered to refund the tax and not the full amount, stating that the validity period had expired. I submitted my initial feedback on September 9. I called the call center every day, and they kept saying they would urgently get back to me. They finally responded the day after my flight date had passed. How is it possible that you cancel my flight, put my ticket on hold without refunding, acknowledge your mistake after listening to the call recording, but still only offer a tax refund instead of a full refund? As a customer, what did I do wrong? You wasted my money for nothing. You say it's not your fault, but you won't provide a flight or a full refund. This is beyond comprehension. I demand a full refund for my flight, including both my miles and the entire amount I paid, without any deductions. Alternatively, I request a one-year flight right to any destination of my choice to compensate for my inconvenience. You have no right to acknowledge your mistake and still leave me in this situation. I will not let this go and will take all necessary actions, starting with the consumer court. Attached is the email confirming that the customer representative made a mistake but they will only refund the tax. I urgently request a response to my feedback.