Yes there are similar problems, did you search this site first before posting 
When did your phone stop working?
Have you tried support@fairphone.com ?
If you used the website support did you get an email acknowledgement?
Does the phone charge and switch on?
Have you removed the battery and tried again?
You could try to remove the modules and reset them, maybe a contact is loose.
The phone line may not be open as advertised {Our opening hours are 10:00-17:00 }.
If you provide detail of your problem and what you have done to try and resolve it you may find some succinct help here, but your post is a bit short on detail