are you suuure it has been confirmed !!!
Yes, it is definitely confirmed. 86 confirmations so far, 0.023045 BTC:
https://blockchain.info/en/tx/db4c02c63e43a284c4b9dd0ad3206f61ce6f622e825412c8bbc37567485665ca(you even said it had 73 confirmations in your subject!)
You need to contact their support - looks like there are several ways of doing so on their contact page - this is a problem with their service or their wallet.
There may be a method of exporting the private key from that address if you are using their online wallet or app and importing it using something else (or sweeping).
thnks for your help .. i contacted them and they said they have a lot of transactions so they may take time .. i am really upset because i need this money to pay an invoice ... please could you suggest to me another wallet that i can reserve my money in securelly with some options like free exchange into dollar and some options of withdraw .. i will appreciate that .