What is the ruling on selling by installments with a 7% payment of the installment value as bank interest, even though the contract is directly with the owner?

If the bank pays the seller the price of the sold item immediately, and then collects the price from the buyer with interest, this is forbidden usury (riba), even if the contract is directly with the owner, and the buyer's ignorance of the bank's involvement in the transaction does not change the ruling.