Unfortunately ​@RobertAitken895, when you look around this online forum, you’ll see the iD Mobile Roam Beyond data add-on seems unreliable or doesn’t work for some customers. 

If you’ve got a dual-SIM phone that’s eSIM capable, a data-only eSIM with a travel plan for Hong Kong might be a better option.

Just Google “travel eSIM for Hong Kong”.

In the UK iD Mobile, use Three UK (3 UK) as their network partner.

Thanks ​@andewhite.  Yes, I rather got that impression...  hoping that someone from ID mobile will pick this up and PM me - at least maybe I'll get my money back

Just to say, the online Live Chat service might be a faster way of getting a refund, ​@RobertAitken895.

If you’re happy waiting, then guessing someone from iD might send you a PM. 

Hi ​@RobertAitken895 

Thank you for getting in touch. 

We are very sorry to hear you have been experiencing issues with the data add on. 

Has this now expired? If yes, were you able to get connected at all? 

Thanks, 

Nat