What is the ruling of Islam on bank loans with 7% interest from the Social Fund in Cairo, knowing that they describe it as a service entity and not a lending entity?

A fixed interest rate as a percentage of the capital is explicit usury (riba sareeh), because Allah Almighty has forbidden usury, and the Messenger of Allah, peace and blessings be upon him, cursed the one who consumes it, the one who feeds it, its scribe, and its two witnesses. If they wish to collect administrative or service fees, they must impose a fixed amount, not a percentage.