Hello ,
how long have you been waiting? DNS really can take 24-48 hours to propagate
Have tried digging through CAA?
dig CAA sarigaziasm.com.tr
You can work through the troubleshooting tips here:
https://docs.netlify.com/domains/troubleshooting-tips/
There’s also this support guide:
https://answers.netlify.com/t/support-guide-troubleshooting-ssl-certificate-errors/39865