What is the ruling on working for a marketing company that acts as an intermediary between clients and usurious banks in selling products by installment with interest, and is it obligatory to leave this job?

Working as an intermediary between the bank and the client to obtain a prohibited usurious loan is forbidden because it constitutes cooperation in sin and aggression. Allah Almighty said: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression." And "the Messenger of Allah, peace and blessings be upon him, cursed the one who consumes usury, the one who pays it, the one who writes it, and its two witnesses." So, the writer and the witnesses are assistants in usury. Therefore, this work must be abandoned immediately, and it is permissible to work in another permissible field.