But now I cannot send anything as nothing is being accepted onto the chain (the tx IDs dont appear in public blockchain explorers at all) and when I use another service to send the raw transactions I get txn-mempool-conflict error.
What can I do to use these funds again? I thought abandoning the transaction would make it spendable again?
txn-mempool-conflict error is because your previous unconfirmed transaction existed in that service's mempool
you need to wait until the network (or that service) drops your previous transaction
or push the new transaction to a node that hasn't received your previous transaction
Please send a txID, or wallet address, in order to be able to check your transaction.
@OP yes, please provide your unconfirmed txid if you don't mind, it would give us more insight on your situation
and you should move this thread to
Bitcoin Technical Support subforum to get more replies and helps