Keep us posted on how you get on. If they confirm the car hasn't got b&o I doubt they'll retrofit it as Audi don't do retrofits. Your only option would be to reject the vehicle.
Glad there's no leak. Be careful not to overfill the engine with oil.
Let's hope it's just the service light. If dipstick is normal, but onboard computer saying it's low then most likely the level sensor is faulty.