I have bought a vehicle early January these year 2023 , my vehicle is on finance , on February same vehicle gave me engine problems, showing engine light, oil leak, smoking non stop, loosing power

I have bought a vehicle early January these year 2023 , my vehicle is on finance , on February same vehicle gave me engine problems, showing engine light, oil leak, smoking non stop, loosing power. Then they take it to their workshop for a months and couple of weeks , they have called me that my car is resolve , then I went there to fetch it , then I drove it for two weeks it gave me problems again . So as I raised the concern still my vehicle is still there at their workshop without resolved. I would like to get help to cancel the deal . Thanks