Is it permissible to reclaim bank interest to cover account statement fees, knowing that the principal amount has decreased due to these fees, and that this interest has not been withdrawn before?

It is not permissible to deposit money in an interest-based bank when one has other options and is not compelled to do so, even if there are no interests accrued on it. Whoever does this must repent and withdraw their money. It is not permissible to take back the usurious interests to cover the cost of bank statements, because it is unlawful money that one is not permitted to own. Rather, all of it should be spent on the welfare of Muslims, such as the poor, and this is better than leaving it for the bank.