Over the weekend our store seems to have “gone down”. It is not an internal server issue I have tried to access the store from data and wifi. I have spoken to our network admin. I am at a bit of a loss here. Can someone help please? https://woolstonprintingstore.com
Thanks 
Lisa
If you purchased the domain via 3rd party registrar (GoDaddy, google domain, etc) check the DNS settings. Ensure they are correctly pointing to Shopify records.
More on this topic:
https://help.shopify.com/en/manual/online-store/domains/add-a-domain/using-existing-domains/connecting-domains/connect-domain-manual
Also, consider opening the ticket with Shopify’s Technical support.
Contact page link: https://help.shopify.com/en/questions#/contact/email
Thank you @Nick_Marketing ! No we purchased our domain via Shopify. Thanks for the link, I have logged a ticket.
Appreciate you help
Lisa
The solution ended up being that access had been blocked by Shopify due to an unverified email at our end, that went to accounts.