I was using an old Electrum wallet. I sweeped the wallet in a single transaction for which I had not turned on "dynamic wallet" (RBF) yet. The transaction is still unconfirmed after one week. I cannot create another transaction as the wallet is now empty and as I said, RBF had not been activated for the transaction.
I need help recovering my bitcoins, and I'm not finding instructions on how to unstuck the transaction. Could you please provide detailed instructions on how to retrieve my balance?
Note, that this is not a duplicate of the canonical question.