Once in a while, a buy is held briefly while we top up the liquidity for a particular coin or network before delivering it to you. Your purchase has not been cancelled and your Naira has not been lost, it is simply queued to be fulfilled as soon as possible, and if it truly cannot be completed you are refunded automatically.
If this goes on for a long time, reply with your Celia Cash username and the coin and amount, and we will either push it through or refund you.