If you have a stalled transaction, you cannot resubmit the transaction within the app.
Here is What to Do:
If your transaction is taking longer than 4 hours, it could be because the network is congested and your transaction is stalled. You can wait for your transaction to clear, use the appropriate block explorer to check the transaction or contact support if you have any questions.
Ethereum and Erc20: Etherscan
Dash: Dash Block Explorer
Litecoin: Blockcypher LTC explorer