CNG drivers

My means of transport is CNG. However, when we want to go to any place like Dhanmondi, Rajarbagh or Gulshan, the CNG drivers just reject us rudely. When they do agree they charge double the amount of money, instead of going by the meter as they are supposed to. Add to that, they are always complaining about how they cannot afford the money that they need to give to the owners. But I can always see one or two CNG's sitting idle near every roadside teashop.