I register a shopify store a week ago.I created a new store,customized the theme,set up payment & shipping and two days later I decided buying Basic Plan $29 but i encountered the problem of “xxxxxxxxmyshopify.com is currently unavailable”.
I appreciate the context that you have shared with us as that is very helpful! Since we cannot authenticate you over the Community forums due to the sensitive information that is needed to be shared, I am unable to look into the specifics. In this case, it would be best to reach out to our live support by attempting to login to your store using the Contact Us page.
Once you successfully logged in, or selected the option to Continue without logging in - you will be directed to the Help Center. Select the topic that you would like assistance with to locate the options to Get Support and speak directly with a Support Advisor about the situation.