Citroen DS3 Engine Oil Problems

I have a 66 plate DS3 and the engine fault light has now been on for about 8 weeks . It went into the garage after about 3 weeks and they said the fault code referred to the oil filter somewhere . The oil filter was flushed twice , engine ...

Red stop light comes on says oil pressure low get vehicle repaired. Judders a bit turn it off and works okay for a bit but then orange service light is on. Car was mot and serviced on Thursday and service light reset by garage