Engine Light Returned One Day After Repair

I collected my car from Wilropark Motor Repair yesterday after the rail petrol sensor was replaced. I was informed that the vehicle had been fully repaired, test driven, and was safe to drive. Unfortunately, today the engine light came on again, which is very concerning considering the repair was just completed. I trusted that the issue had been properly resolved before collecting the car. At this point I’m unsure what the next step should be, as the problem seems to have returned almost immediately after the repair. I would appreciate guidance and assistance from Wilropark Motor Repair on how this will be addressed.