Nissa Car Rental Won't Return Deposit And Ignore Customer's Request

I rented an SUV from Nissa Car Rental, picking up the vehicle on 29 May 2026 at Gaferli Avcılar Mah., Göreme Beldesi İsalı, Bilal Eroğlu Cd. 69/4, 50180 Göreme/Nevşehir, for a 2‑day rental. During the rental, a deposit of 500 euro was charged to my card. I was clearly informed that this deposit would be returned within 21 business days. However, more than 35 business days have now passed and the deposit has still not been refunded to my account. I also attached a bank record that shows the original transaction of 500 euro. I contacted Nissa Car Rental by email about this issue, but I have not received any reply, which is very disappointing and unprofessional for a company in the car rental sector. I request that my 500 euro deposit be refunded to my card immediately and that this delay be explained in writing. I kindly ask that this matter be resolved as soon as possible.