I think it was my fault, I directly withdraw from gambling site which is their transaction fee for withdrawal is free. Fee is free so I should expect that my withdrawal confirmation takes too long.
I'm not saying its your fault. I'm just thankful for this kind of service of your Smartmixer.
The withdrawals from gambling sites or services where the fees are very low or free are usually approved in batches by the service so when you have to do such a withdrawal, you have to put it in mind that it may take more than 24 hours therefore it's wise to first withdraw into one your personal wallets where you can control the transaction fee before sending the bitcoin into the mixer with the optimal fee.
Otherwise, it's great to know that things worked out for you without any complications