What should I do? No worries! Just use Contact Support and let the buyer know when you can ship it, and keep them updated. If they need it before you can ship it, offer to cancel and refund them. If you don't use Contact Support to extend your shipping deadline, orders will be cancelled after 4 business days (excluding weekends and holidays) have passed.
Unfortunately, we can’t extend deadlines without buyer approval, but if an order does cancel we are happy to assist you with re-listing!