Answer:
(Fatwa: 1338/1338=M/1430)
When you have paid off all the instalments, you became the owner of it. Now you are free whether to keep it or sell it, but you should repent to Allah for the sin of having interest-based transaction and avoid doing such dealing in future.
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband
