The most likely reason is that your transaction has not yet been confirmed on the blockchain. Here's how to check the status of your transaction.
Login to your account at CoinPayments.net
Click 'Transaction History' in the top menu then click on 'Withdrawal History' and you will see the status of the transaction. If it shows as complete your account approval is imminent.
You can also follow the progress of your payment by copying the TX ID into the search here on the blockchain and click search.
On the results page look in the summary section for 'Confirmations' we need at least 3 before your account is approved.