Delivered old manufactured scooter

Dear Sir, I visited flash motors authorised Vespa/ Aprilia in JP nagar on August 11th 2020 through my friend reference who was known to the owner of the dealership, in Bangalore. Due to Corona their was offers going on and gave 10000 discount on the scooter actual price was 1.45 lac and it was through reference total invoice came to 1.36 lacs.Based on negotiations they delivered Aprilia BS6 scooter on 12th August. My issues: 1) After taking the delivery, sales executive said do not fill full tank fuel, because petrol leaks and smells. 2) Instrument console doesn’t show proper fuel. 3) Mileage never crossed 16, they said run 1000 km it will gradually increase, so I did not bother on this and ignored. 4) I never received road tax receipt nor got message from Vahan which is govt site on proof that dealer paid the road tax. 5) RC never came via post which was assured by dealer after so many follow up after 5 months I got it from the dealer. 6) DELIVERED 2019 Manufactured scooter in August 2020 and did not inform me that they were selling old model and I was kept in dark by the dealer, shock of my life, dealer never informed me about the model, vocally said it was January 2020, in insurance copy they mentioned 2020, when I questioned the Brach Manager he said what is available in Stock will be sold and regarding insurance he said it will show 2020 bec it was purchased in 2020. I received RC on 14th January 2021 from this day I was behind the dealer and was giving me fake promises saying they will resolve this issue and finally said we can’t help do what you want. Please help me so I get justice from this mental agony.