Once order is placed it can be cancelled before it's processed by the store, the cancellation action can b done through NowNow app under ‘Orders’ section.
For prepaid orders, our payment process allows us to charge you the amount at the time of shipping and not at the time of order placement hence the amount that we would charge you will be corresponding to the value of items that we ship and deliver. So in case, your entire order gets cancelled, we won’t charge you at all.