Hey @optimize1 .
Thanks for quick response.
Once you navigate to our Contact Us page, you can attempt to login to your online store or select the option to Continue without logging in and you will be directed to the Help Center. I took a couple of screenshots to assist you with the navigation.
Select the topic that you would like assistance with, in this case - we can choose the topic Account.
Since this error message is occurring when you attempt to login to your online store, we can select Logging in to see the options to contact our live support.
After that is selected, you can scroll down on the page to see the options to Get Support.
Let me know if you have any additional questions.