Pending means the order exists but has not been provisioned.
THE USUAL REASONS
Payment has not confirmed. Bank transfers wait for manual verification. The payment failed at the final step, so no funds were actually taken. The order was flagged for fraud review. A domain registration requires documentation or manual processing, common with restricted extensions. A provisioning failure that needs a manual push.
WHAT TO CHECK
Billing > My Invoices. Is the invoice marked paid? If not, payment did not complete and the order is waiting on it. Your bank statement. Was the amount actually debited, or only authorised? Your email, including spam, for a verification request from us.
WHAT TO DO
If payment confirmed and the order is still pending more than a couple of hours later, open a ticket with the invoice number.
If a verification request is sitting unanswered, reply to it. Orders under review do not progress until you respond, and this accounts for most long-pending orders.
WHAT NOT TO DO
Do not place the order again. A duplicate order creates a duplicate invoice and, for domains, may fail outright.