Is it permissible to utilize the Tawarruq method for the necessity of marriage, given the existence of a previous car installment taken from the Arab Bank, and the inability to transfer one's salary to another bank?

If it is proven that the bank deals with usury (riba), then it is not permissible to deal with it. Rather, one must get rid of the remaining installments as soon as possible, along with repentance. Tawarruq (monetization) is originally permissible in Islamic law, but it is forbidden to deal with usurious banks, even if it is for the purpose of marriage or buying a house. A Muslim must be patient and practice self-restraint.