I was trying to commit eth into Fei Protocol.
But after Genesis, I found that I pressed commit many times and one purchase was in pending status, and since I didn’t have enough eth in my address to pay, I couldn’t cancel the purchase.
Due to this problem, I was not able to Redeem Genesis Tokens.
I would like to know what can be done to solve this problem.
Welcome to the MetaMask Community @NeoTheMagician!! 
If you do not have enough gas to complete a transaction, it will eventually fail. The gas used to try to complete the transaction will still be deducted, but you will receive the tokens you were trying to send back into your wallet.
Once the transactions all complete or fail, you should be able to redeem your tokens.