Is it permissible to spend money earned from usury in the bank until the funds that were borrowed and not returned three years ago are recovered?

You must repent from opening an account in a usurious bank, because it involves dealing with usury and aiding in sin, in accordance with the Almighty's saying: "And do not cooperate in sin and aggression." You must withdraw money from the bank unless you are compelled to keep it there due to the lack of any other means to safeguard it, such that no non-usurious accounts are available. If you can only find a usurious account, then the usurious interest must be spent on general Muslim welfare or given to the poor and needy. It is not permissible to keep it as compensation for debts that have not been repaid to you.