Five different instances when white smoke is coming out of a 2012 Landrover Discovery 4 SDV6 HSE

The Car was bought over a year ago and has been with them more than I have driven it they have attempted to repair it and not succeeded several times and now have the cheek to ask if I would put more money towards another car! Even though I have not had full use of the one they sold me. So in short sell someone a car they cant fix then muck them around for a year hoping they get worn down to buy another car which may have the same faults they cannot fix! Once bitten twice shy Marshall Landrover at the Marshall Car Centre Newmarket Road Cambridge CB5 8SQ