Is it permissible to take a loan from an Islamic bank that requests invoices for home maintenance materials and is repaid to the bank with an 8.5% increase?

If the bank pays the price of goods on your behalf to the entity from which you purchased them, and then collects the price from you with interest, this is forbidden usury (riba) because, in reality, it is a loan with usurious interest, and it is not permissible to deal with it in this manner. However, it is permissible to deal with it if the bank purchases the goods, takes possession of them, and assumes responsibility for them, and then sells them to you.