What do I do when an invoice expires via Bitpay but I have not yet paid it?

When you create a BitPay invoice it is only valid for 15 minutes. If the invoice expires, you will have to return to CoolWallet’s website in order to submit your payment. After the invoice window has expired, you will see the return button at the bottom of the page. Click return to be redirected to CoolWallet’s website to generate a new invoice.

Alternatively, you can go to CoolWallet’s website and complete your transaction by creating a new order and selecting Pay with BitPay again to generate a new invoice. 

If you tried to pay for the invoice and the transaction was not accepted by the Bitcoin network, the funds will be spendable again in your wallet. Depending on your wallet, this may take 48-72 hours.