before trying to withdraw your grin, make sure that your address is reachable .
in grin++, your url should be displayed in green (not orange)
you can also use this tool to verify if your wallet is reachable : https://grinchck.uber.space/
Status is green now but w
hen I transferred the coins it wasn’t.
Do you know what will happen to the transfer I made? Will it be sent back to the broker because the payment could not be delivered? Or is there something else I should do?
The transaction is not finalized. The grins haven’t left your broker’s wallet.
It’s usually the case with exchanges that if a withdrawal doesn’t complete, the customer will be able to try another one within 24 or 48 hours. It takes some time for them to define it as a failed transfer.