Below is an explanation as to why this would occur:
The reason your balance is now showing 0 is because your pending balance is being transferred to your wallet.
The payment is currently making its way through the blockchain and it will display in your wallet once it has completed.
If you have not received your ETN from mobile mining in 14 days please get in contact with our support team and we will look into this further for you.
In the meantime, please continue mining whilst your payment is being processed.