Site is down, google finds no new address. Can find nothingness on bitcoin forums, but Gregor not brightest crayon, perhaps doesn't know how to search.
The site was shut down in November and the former operator claims to no longer be involved with the service.
That operator is now attempting to raise funds for a new venture, Ziggap.
QuickBitcoins didn't take deposits. They were a service used to buy coins for immediate delivery or for selling coins with immediate cash-out.
If you are owed bitcoins or funds from a cash-out transaction, the operator at the time would still be responsible for that liability, regardless of whatever disclaimer is provided about now "no longer having any relationship" with the service.