ALWAYS read the terms of service and conditions for withdrawals. Don't fall for those scummy tactics casinos use, and its honestly quite common amongst the newbie ones too. It's really blatant and obvious that they are doing this to milk unsuspecting people of their money. The fact that its 5x the amount deposited too is nigh impossible to achieve as well.
OP, you either play it safe, leave the funds there and hope they lift this restriction up as the casino itself grows. I'm saying this because this is extremely unsustainable, as it hurts their reputation in the long run, and any gambler worth their salt would sniff their intentions through this, and the casino'll wise up eventually. The other way out, if you really need those funds, is unfortunately through gambling your way out. Good luck.
Only people who have a lot of money can achieve it, but it depends on their willingness to lose all the money.
We as gamblers, also have to think about whether it is worth doing because something impossible can never be achieved for small gamblers like us.
But it seems that the casino will not lift this limit because it should have been that casinos did not use high limits on their users.
After all, it could make users uncomfortable playing there.
The way out of this is to never deposit into such a casino and rather find another one that doesn't have such high wagering requirements that you shouldn't have any trouble getting there.