Firstly, make sure that you are operating on BitcoinWorld (bitcoinworld.com), be careful to the phishing websites and enable the temper-proof code. Click the withdrawal confirmation button when confirming the address correct then input the temper-proof code (please enable the temper-proof code A.S.A.P). The operations are confirmed to be personal operations by emails then confirmed by administrator background. The payment finished means successful withdrawal and waiting for money transferred into users' accounts. If the website shows the withdrawal status is broadcast but not found in the block browser, you need to contact Online Customer Service A.S.A.P.
Please pay attention to the validity of the address during the withdrawal. Because the operations are irrevocable, once the withdrawal is confirmed, the money can't be recovered.