It's you're fault partially because you send an improper or rather an incorrect information, that's why they have done this. Also, I can get why they're trying to hold it down, they're probably trying to be careful that there's nothing shady about the withdrawal, that's a large amount that you have.
Hi!
I agree, this is certainly and my fault: at least I should have clarified with support in live-chat whether it is allowed to do this (before I made deposit).
But surely this isn't a reason for stealing my money and my winnings, especially without any explanation... And even more so, it shouldn't be ignored for 2 weeks (in my opinion).