We have had one of our smallest stores on BigCommerce for almost ten years. The store is too small to go to the trouble of switching to Shopify (but this will change). Anyway, a couple of days ago, they cut off the store for no payment, and we immediately paid the invoice. Here is the thing: they don´t send out any invoices for you to pay, they don´t send out any reminders, they don´t send out payment failed warnings, nothing.
Regardless, even after we paid, the store is still offline. We tried reaching out to them in numerous ways (good luck getting a "support pin" when you can´t access your store). They don´t reply to reviews anywhere, emails, chats, or PayPal claims.
Their score on these review platforms, including the BBB, is the worst. I can not imagine this company ever getting new customers!
Recommendation: Use Shopify and short BigCommerce stock. Down 80% plus with another 100% to go