Enyi mlio amini! Msiliane mali yenu kwa dhulma, isipo kuwa iwe biashara kwa kuridhiana wenyewe. Wala msijiuwe. Hakika Mwenyezi Mungu ni Mwenye kuwarehemuni.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Questions about halal and haram
Is taking other people's money unjustly haram?
Yes. Allah says: do not consume one another's wealth unjustly (2:188), and that trade by mutual consent is lawful (4:29).