Toyota review: car

I bought a car from this dealer and I still have warranty. I have problems with engine (loss of oil) and they dont want to fix. They said that it is normal. They want to finish my warranty and after that they will fix. Normally from the beggining the car was normal without loss of oil. After 50000 km it start to loss oil-about 1 liter on every 10000 km. It is not normal for this car but service office does not want to fix this. I need help for this case from instance under toyota macedonia.