Anadolu Sigorta Green Card Cancellation Delay Complaint

Anadolu Sigorta is refusing to process my insurance cancellation, which is causing a delay in obtaining a new policy. I would like to cancel my international Green Card insurance. They assured me that they would provide a response within 4 business days for cancellation, but this timeframe goes beyond my departure date, causing me significant distress. After the cancellation, I can help you set up a new insurance plan. Could you please speed up the cancellation process?