Turkish Airlines Invalidated My Round Trip Tickets Without Informing Me of Time Limits

"Here is the translation of the provided text from Turkish to English: I am receiving an email from Turkish Airlines stating, "I cannot get a refund because my refund period has expired, but I could have received a refund within 2 years from the ticket date." Why don't they mention that I visited the Taxim sales office of Turkish Airlines multiple times but did not receive a refund? The received email states, "We cannot process refunds for tickets older than 2 years. In your previous feedback responses, you were instructed to visit one of our sales offices because agency tickets cannot be refunded by our call center." But I have visited the Turkey sales office many times. I spoke with the representative there, gave my email address and phone number, but they did not contact me. The refund amount is (RS. 13,602 or 4,413.01 TL). I just want my money back. I only want my refund, nothing else. I am attaching the last email I received from Turkish Airlines here."