New contract cannot call or text or connect number to imessage

[Sfish]

I got a new phone and contract with Sky last week. I have followed all steps and it appears the sim is now set up including eSIM and my old Vodafone sim does not work. 

I can receive calls and texts but I cannot make any calls, texts or access mobile data. My number won't connect to iMessage either. 

I've tried everything I can think of in device help and nothing is working. 

I can't call sky as my old sim is no longer working and this new one won't let me make calls. 

please can anyone help?