Are you sure you want to redeem your coupon UNOWEEK200 for about BTC0.002989?
I tick yes and I got error
You already redeemed another coupon in this category. You can only use one coupon code from one category.
I got 0.004 Btc on signup still stucked in unicorn account
If you have already redeemed another coupon from unocoin, you cannot redeem another coupon again. If you wish, you can just withdraw your balance (0.004 BTC) to another bitcoin address/wallet (Goto Dashboard->Bitcoins->Send/Receive).