I'm using Coin Space wallet. First I send a test transaction and this one was confirmed quickly. I send next one the day after and I had to lower transaction fee. This transaction is sitting unconfirmed for the last two days. I'm new to BTC and I wish I knew about all the nuances with lower fees and options related to different wallets. This one does not have Replace-By-Fee option. Is there any other way cancel this transaction? Please advice. Thanks!
At first don't use low fees, especially currently because network is spamed with some transactions and confirmations are very slow, so use this website to determine fees:
https://bitcoinfees.21.coAlso it would be better if you add your transaction tx here and we will be able to give you better advice. Try adding transaction in viabtc accelerator or contact quickseller for adding your transaction in f2pool.