Thank you for your reply. What would I see on blockchain/tx if it got returned? In other words, how do I know that it was returned?
The bitcoin doesn't actually get returned. It simply doesn't confirm and the transaction is dropped eventually. Your wallet will revert to a state where that Bitcoin was never spent, thus it seems as if the Bitcoin is returned. You won't see anything on the blockchain and most block explorers will stop showing your transaction after a while. Your wallet should also show that the transaction is gone.