Hey @aygul
Welcome to the community and thanks for your post.
I'm sorry to hear of the issues that you're having with your landline at the moment.
I have been able to locate your account and cannot see any issues that would be causing the problems that you're having. Do you have dial tone and are you able to make outgoing calls at all?
Is it mobile numbers or landline numbers that cannot get through or both?
Regards
Steven_L