Q: iMessage Activation

I have the iPhone 6s, and just recently updated to 9.3.5. All of a sudden all of my contacts are gone, they could not be backed up from iCloud, I manually put them in which is why that is not my problem. My iMessage will not activate and when i do it says 'An error occurred during this activation. Try again.' Does anyone know how to fix this?

I have restored my phone, restarted it, factory reset it and everything. Please help.