Go to your BETRWallet account - your winnings will appear in your history. It may take about 10 mins or so (depending on the network at that time) after the event has been settled. You can also see your placed bets under the 'Bet History' tab in the top right of the app. In addition to that, you can also use blockchain explorer like https://etherscan.io/ and view your wallet transactions. Every bet and win is transaction on the Ethereum blockchain.