MacBook Air FaceTime error

My specs are:

Model Name: MacBook Air

Model Identifier: MacBookAir7,2

Processor Name: Intel Core i5

Processor Speed: 1.8 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache (per Core): 256 KB

L3 Cache: 3 MB

I have tried everything on the internet I can find such as: If you get an error when trying to activate iMessage or FaceTime ..., Is Apple FaceTime down? How to fix FaceTime problems - Macworld UK, and [Solved] FaceTime Not Working on Mac/iPad/iPhone? Fix Now!. Nothing is working, I am up to date and connected to wifi, any ideas?

Memory: 8 GB

Message was edited by: StevenDubs