Upon receiving ETH, Saga's smart contract immediately mints and sends SGR tokens to the address it received the ETH from. So, when buying SGR you are always in the possession of either ETH (before the transaction took place) or SGR (after it happened). Your ETH sending transaction might have failed or that it is still in pending mode, try to check its status using your wallet or a block explorer like https://etherscan.io/. For further assistance please contact our support.