Petrol driking Mechine ( Avrage 5-6km/l)

My name is Johnson Correya and I currently reside in Powai (Mumbai). I have purchased a petrol model Jeep Compass Sports Variant with Manual Transmission. Before buying the vehicle, I had checked reviews on different websites about this vehicle and discussed the features with the sales team, especially with the salesperson from the Landmark Mumbai showroom (Abhishek). All automobile related sites and the salesman had claimed that the mileage for this model is 14-17 km/liter. I don't have any other problems with this model except the mileage for which I am getting an average of 5 to 5.5 km/liter with a mixture of conditions like traffic, without traffic and high way etc. I approached the CRM Mr. Salim who asked me to bring the car for a check-up. I dropped the vehicle off on 14/11/18 after completing 1200 km. I had reset the meter just before I dropped the vehicle at the service center. Service adviser Prateek attended my vehicle and suggested me to come back after 3 days as they wanted to test the entire vehicle. I complied and collected the vehicle after 3 days had elapsed. While I was collecting the vehicle, he informed me that they had checked the vehicle in traffic conditions and they had gotten 10 km/liter with no other technical issues in the vehicle. They have written the average mileage as 10 km/liter in the service form. I checked the mileage meter just after leaving the service center then I realized that the mileage was 4.5km/liter and they have driven the vehicle 14.5 km. It was a barefaced lie which they told me that they got 10 km/liter in traffic conditions. I had informed the mileage issue to the CRM (Salim) again. He had suggested that he would send one person with me to check my driving pattern. He had sent Aditya Dhere on 23.11.18 at 6 pm at my office. He accompanied me for 2 km in traffic conditions. He understood that the issue is with the mileage and not with my driving patterns. He had taken a picture of the mileage meter and sent it to the CRM. We got 2.2 km/liter for around 2 km drive with 25 minutes of travel. I don't travel always in traffic, 5-5.5 is an average of a mix (all conditions). It is not worth driving this vehicle with the kind of average I get and why the company is offering an impossible mileage of 14-17 km/liter is ludicrous and preposterous. They haven't given any solution till date. My humble request to the customers, please do not buy Jeep compass as they are selling the car with fake commitments.