Are you talking about Mrai? The first time I deposited to Mercatox it took 3 days for my mrai to arrive in my wallet at Mercatox. So it is possible.
But I suggest you to contact the support of Mercatox, because it's been over 24 hours now, if you have the hash id they can look it up for you.

Dammn.. wallet synchrozing is too slow 
Is there any faster way to synce my wallet?
Current block count.. 589749(223201)

Its something at your connection, but well with those blocks it should take a few hours to end, i do mine sync all days and it takes 10-20 minutes.

Minimum deposit at mercatox is 100 mrai if you sent 100 rai your deposit is lost, i had said several times mercatox has some issue with crediting the mrai.

I think better save Seed
https://github.com/clemahieu/raiblocks/wiki/Wallet-Backups
and after backup install latest version 7.8.3 with improved synchronization
https://github.com/clemahieu/raiblocks/releases

Thats the problem you were using a old wallet the 7.8.3 version is very fast to sync the blocks, all you need is to download the new one and run it while other version are closed, but sure save your seed is always a good way to avoid any possible problem.

Link. No transactions in explorer for your account in @RaiWalletBot

Restore other addresses with Advanced --> Accounts --> Create account

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so i tested out mercatox since more than a week ago. i have tried a minimum deposit then i also tried a minimum cashout of 100 XRB.
after several days the coins were still not in my wallet. their support gave the has number of the withdrawal and it says in the block chain the transfer is not yet pocketed? is this possible? i already synced and unlocked the wallet still the coins wont arrive. can anyone help?

https://raiblockscommunity.net/block/index.php?h=917387A82BF80273200EA3D949D1A22107683F23CF6066E592A2507E44EDED86