Hyundai Lenasia

My car went in for a service on the 11 Novemeber 2019, i had to make means hense i asked my father to take it as i had work considering i work in an academic field. I was not happy that my car was not washed i ignored that only today this thing hits me so hard that at least check your oil only to find out that my engine oil is empty but "my car was serviced" i called the dealership and the person assisting me was rude i was not informed that "my oil is leaking" as i don't know anything about cars i also do not see any oil leaks when parking and driving of. The only advise was i have to pay for that, i have to come to the dealership and that is costing me annual leave as well as making other means for transportation. How am i only informed that my engine leaks oil but oil was drained of the engine and "poured" again. I was charged for that engine oil which is empty as my car engine oil is now buzzing, how do i get told to bring the car that does not have oil, customer service is terrible. How does a dealership allow a car that leaks oil to drive of? All i need is my refund and take it to another hyundai dealership. The quote stated engine needs to look into but me as the vehicle owner was not informed my father just gave me the qoute as he was just happy that he took the car in for a service. The person assisting me further said "your car has no warranty how are you going to pay for that?" This is an insult to me as a person it feels like because i am driving an i10 i cannot afford to pay for my car. I was not assisted at all instead i was told about payments i need to make again concidering taking the car there is another money and they will charge me for labor. I need a refund and good work to be carried out