Do any mast issues show here for you:
https://www.sky.com/help/servicestatus/mobile
If not then you will have to contact Sky, perhaps via social media as there are links at the bottom of this page to their sites or via the messaging service here:
https://www.sky.com/help/articles/replacement-sim
At the bottom of the above link select - No, I still need help >No, I want to get in touch > tick both boxes > Get in touch.
__________________________________________________________________________________________
If someone has helped you then please click on the LIKES button in their post.
If you need help please provide as much information as you can
