Can't take incoming calls-'number does not exist'

Hi chuffster 

Welcome to our forums, and thank you for your first post. Sorry to hear you are unable to receive incoming calls on your landline. We can understand the inconvenience caused, and we want to best help. To best look into this, we are sending you a private message. Please keep an eye out for an envelope at the top right corner of your Forum page. Let me know if you have any issues locating this

Thanks