VW Service is Appalling

I have recently bought a new 2018 VW Polo. On the second day of having it I got error sensors on my dashboard. I contacted the dealership and they collected the vehicle. They brought it back and said everything was fixed. I got everything factory fitted!! On the day I drove it after it came back the same warning lights appeared. This is a brand new car!!!!! They have collected the car again yesterday to check why I am constantly getting the errors. VW dropped off a courtesy car yesterday all to find out that the Fuel lights is on!!!! When i inform them about this, they tell me that I must refuel the car and they will reimburse me...what nonsense is this?? Honestly I will never own a VW product ever AGAIN!! This is my first and last!!! I am highly disappointed with the service I have received from Volkswagen. Company is happy when you purchase and don't look after their clients after the sale!!!