Before the trade cancel automatically, you have 30/60/90 minutes to make payment, times is set by the seller. You have to make payment and select “payment completed” within the time. If you have done transaction of payment but forget to select “payment completed”, you can request to the seller to reopen the trade. Buyer must make sure the payment is received only release coin.
If seller not willing to reopen the trade, buyer can contact to PPbits customer service and provide the name of the seller and UID to customer service.