You shouldn’t need to activate a new SIM from iD Mobile, @Sutherland TTanya. 

Customers receive an activated iD SIM, so it’s ready to use with their new handset.

Sounds like your SIM is faulty or there’s a problem with your iD account. 

This forum article might help. 

Hi @Sutherland TTanya 

I’d recommend the above from @andewhite, iD SIM cards are activated upon dispatch and wouldn’t need activating later.

Please let us know how you get on.

Tom