If the transaction is failed but the funds have been credited from your account, contact the support team and give the details of this transaction (TXid or value).
If the transaction is pending, there is nothing to worry about as we process BTC transactions after 3 confirmations on the network. All you need to do is to wait for it to be completed. Sometimes it may take a couple of hours, it depends on the speed of the network.
NB: Large BTC amounts may take longer to get processed for the security reasons.