Yes, unconfirmed Bitcoin transactions will eventually be recognized as invalid by the network. At this point, funds in the sender’s wallet associated with the transaction will recognized as unencumbered and available for another transaction.

And when making any bitcoin transactions make sure you use a good bitcoin exchanger that is not a scammer,make sure the exchange service is reugulated and reliable,also make sure that you are sending funds to the correct bitcoin address in other to avoid issues when doing the transactions