On an exchange, if a transaction is marked as "Success" or "Completed," it does not mean that the exchange has fully processed the transaction: it means that the transaction was posted on the blockchain.
You will need to wait for a confirmation of the transaction.
Different blockchains require a different amount of confirmation, and some blockchains are faster than others by design.
It may happen, rarely, that the blockchain gets congested and the transactions can take a lot longer to confirm. You can compare it to a traffic jam: the transaction will get arrive but slower.
If a transaction is marked as "unconfirmed" be patient.
If your transaction has been sent to BitcoinBlink and somehow you did not get credited for it, please send us (support@bitcoinblink.com) the following details:
- Your Account ID
- The Transaction ID (TX ID)
- The type of Crypto that you sent