If nothing of the above works, you can head over to the RenVM Explorer, by clicking on "View transaction" next to the "RenVM" label in the minting overview. You'll be provided with an overview of your mint. Click on "Load additional details" and wait for the information to be loaded. Now you'll be able to connect your wallet (the wallet you were connected to VarenX with, while sending the funds to the gateway address) and will be able to complete the mint, by clicking on "Submit" and signing the transaction.